СПОСОБ ПРОИЗВОДСТВА ГРАНУЛ ПО МЕНЬШЕЙ МЕРЕ ОДНОГО ОКСИДА МЕТАЛЛА

Настоящее изобретение относится к способу спекания прессованного порошка по меньшей мере одного оксида металла, выбранного из актинидов и лантанидов, для производства гранул ядерного топлива. Указанный способ включает следующие последовательные стадии, проведенные в печи в атмосфере, содержащей инертный газ, водород и воду: (a) повышение температуры от начальной температуры Tдо температуры Tвыдержки, которая находится на уровне 1400-1800°С, (b) выдерживание температуры при температуре Tвыдержки и (c) снижение температуры от температуры Tвыдержки до конечной температуры T. В ходе стадии (a) от температуры T, пока не будет достигнута промежуточная температура Tмежду 1000°C и T, отношение парциальных давлений P(H)/P(HO) является таким, что 500 < P(H)/P(HO) ≤ 50000. В ходе стадии (c) от второй промежуточной температуры Tмежду Tи 1000°C, пока не будет достигнута температура T, P(H)/P(HO) ≤ 500. Режим обжига может включать понижение температуры после выдержки при Tдо уровня 20-500°С с последующим ...

СПОСОБ ПОЛУЧЕНИЯ ТАБЛЕТОК ЯДЕРНОГО ТОПЛИВА

... 1. Способ получения таблеток ядерного топлива спеканием материала с содержанием диоксида урана UO2, полученного из порошка, приготовленного способом конверсии гексафторида урана UF6, отличающийся тем, что в емкость с подвижными телами для уплотнения и смешивания вводят порошок, полученный непосредственно способом конверсии гексафторида урана UF6,, и производят встряхивание емкости таким образом, чтобы порошок перемещался в пространстве емкости по трем не копланарным осям для своего уплотнения между подвижными телами и между подвижными телами и стенкой емкости до образования дисперсного материала с плотностью в неуплотненном состоянии менее 1,7 г/см3, и что дисперсный материал, полученный смешиванием в емкости, применяют для формования сырых таблеток, подвергаемых затем спеканию. 2. Способ по п.1, отличающийся тем, что емкость подвергают трехмерным колебательным движениям. 3. Способ по п.1 или 2, отличающийся тем, что введенный в емкость порошок получают способом сухой конверсии с плотностью ...

Огнеупорный материал

Piezoelektrische Keramikmassen

Verfahren zur Herstellung von piezoelektrischen Keramikkoerpern

Improvements in ceramic compositions

A ceramic composition having piezo-electric properties consists of lead titanate and lead zirconate in mol. ratios of from 60 : 40 to 40 : 60 and 0.5-3.0 weight per cent of antimony oxide or 0.5-4.0 weight per cent of bismuth oxide or a combined weight per cent of 0.5-4.0 of both antimony oxide and bismuth oxide. Up to 15 mol. per cent of the lead may be replaced by barium. The ceramics are preferably prepared by weighing, wet milling, filtering and drying a mixture of lead monoxide, titania, zirconia, barium carbonate, and antimony oxide or bismuth oxide, which is then calcined in open saggers at about 1550 DEG F. for two hours. The composition may then be remilled, filtered, dried, mixed with the usual binders and fabricated to the required shape. The binders are removed by firing in open settings in air at 1200-1400 DEG F. for half an hour. The ceramic is then subsequently fired to maturation in sealed refractories usually in the presence of a cup of lead oxide.

Piezoelectric Ceramic Materials

... 1,199,587. Piezoelectric ceramics. TOKYO SHIBAURA ELECTRIC CO. Ltd. 26 Oct., 1967 [28 Oct., 1966], No. 48753/67. Heading C1J. A piezoelectric ceramic consists of, in mol. per cent, 40-50 of PbTiO 3 of which up to 10 is replaceable by SrTiO 3 ; 0À5-6À0 of Sr(InNb) 1/2 O 3 and remainder PbZrO 3 .

Lead titanate zirconate ferroelectric ceramic material

A modified PZT ferroelectric ceramic includes an amount not exceeding 5 wt. per cent of thorium dioxide and an amount not exceeding 0.3 wt. per cent of chromium sesquioxide, the modified PZT material having the formula PbnXm(TixZrySnz)O3 where X represents Ca and/or Sr and/or Ba, n is at least 0.75 with n + m = 1, x = 0.10 to 0.60, y = 0.00 to 0.90 and z = 0.00 to 0.65 with x + y + z = 1, and m and/or z is greater than zero. The modified PZT basic material together with the additives is mixed in a ball mill and presintered at 900 DEG C. for one hour and then pulverized. The powdered material is then pressed and sintered at 1300 DEG C. for one hour. Silver electrodes are applied to the pressed element and polarization effected by application of 50 kv./cm. for one hour.

Improvements in or relating to piezoelectric devices

... 1,142,872. Piezo-electric ceramics. SUMITOMO ELECTRIC INDUSTRIES Ltd. 9 May, 1966 [26 May, 1965; 15 Nov., 1965], No. 20356/66. Heading C1J. [Also in Division H1] To a piezo-electric ceramic of PbZr( 1-x ) Ti x O 3 (x = 0À4 to 0À5), 0À05 to 3À0 wt. per cent of In 2 O 3 is added after partial substitution of Pb by Sr. 0À01 to 0À10 wt. per cent of B 2 O 3 or V 2 O 5 can also be included.

Production of pellets of ceramic material

Ceramic pellets, which may have, or not, nuclear fuel materials embedded therein, are formed by first preparing a gel by precipitation of metallic salts from solutions of their compounds at a concentration of at least 10 grams per liter, said solutions being added dropwise to a coagulation bath which contains, for example, ammonium or sodium hydroxide, whereafter the precipitated gel are fired, in one or two stages, to precondition them prior to the compaction to form the final pellets which are subsequently sintered at an appropriate temperature.

Improvements in or relating to ceramic compositions

A ceramic composition having piezo-electric properties consists of the following constituents given in gram-mole percentages:- ...

Method of preparation of combustible materials and products obtained by this process.

Mixed uranium and thorium oxide.

Process of obtaining oxides of therium.

Procedure for the production of nuclear fuels

PROCESSES FOR PRECIPITATING METAL COMPOUNDS

PROCESSES FOR PRECIPITATING METAL COMPOUNDS

FABRICATION PROCESS FOR NUCLEAR FUEL PELLETS

ORIFICE STRUCTURE FOR EXTRUDING MOLTEN METAL TO FORM FINE DIAMETER WIRE

FINLEY-DIVIDED METAL OXIDES AND SINTERED OBJECTS THEREFROM

PROCESSES FOR PRECIPITATING METAL COMPOUNDS

CERAMIC ARTICLES

PIEZOELECTRIC CERAMIC COMPOSITIONS

The present invention relates to a piezoelectric ceramic composition of a solid solution of a material, Pb(Sn1/3Nb2/3)xTiyZrzO3, wherein 0.01?x?0.25, 0?y?0.75, 0?z?0.875 and x+y+z=1, which further contains a quantity of cobalt equivalent to from 0.1 to 3 weight percent of cobalt oxide(CoO). This ceramic has a high mechanical quality factor, high stability of resonant frequency over wide temperature range and high stability of capacitance ratio over a wide time range.

REFRACTORY MATERIALS

PIEZOELECTRIC CERAMIC COMPOSITIONS

Zunderfester und bei hohen Temperaturen korrosionsbeständiger Werkstoff

Procédé pour la préparation de pièces en carbure d'uranium

Elektromechanisches Umformungselement

Procédé d'élaboration de corps constitués par une dispersion d'une matière réfractaire dans une matrice carbonée étanche aux gaz

Verfahren zur Herstellung von gesinterten Körpern hoher Dichte

Procédé de préparation d'un matériau combustible et matériau combustible obtenu par ce procédé

Procédé de fabrication d'un article comprenant au moins une phase dure à haut point de fusion et article obtenu par ce procédé

Verfahren zur Herstellung eines Einkristallkörpers

Verfahren zur Herstellung von kristallinen Carbidkügelchen und damit hergestellte Kügelchen

Procédé de fabrication de pastilles frittées utilisables comme combustible nucléaire et pastille frittée obtenue par le procédé

Elektromechanischer Resonator

Procédé de préparation d'un oxyde métallique finement divisé et produit obtenu

Procédé de préparation d'un produit réfractaire, dispositif pour la mise en oeuvre du procédé et produit réfractaire résultant du procédé

Elektromechanisches Umformungselement

Procédé de fabrication de bioxyde d'uranium fritté de haute densité et de composition stoechiométrique à partir d'uranium d'ammonium

Verfahren zur Herstellung von kristallinen Carbidkügelchen und damit hergestellte Kügelchen

Verfahren zur Herstellung eines titan-keramischen Filmes

Verfahren zur kontinuierlichen Wärmebehandlung eines Materials in einem Ofen, zur Durchführung dieses Verfahrens dienender Ofen und gemäss diesem Verfahren behandeltes Material

Vorrichtung zum Trocknen von Kautschukmassen

Verfahren zur Herstellung von plutoniumhaltigen Thoriumoxyd-Teilchen

Ferroelektrische, keramische, elektro-optische Vorrichtung

Procédé de préparation d'une céramique poreuse à partir de matériaux fissibles

Procédé de fabrication de pastilles frittées en oxyde d'actinides

Piezoelektrisches Element und Verfahren zu dessen Herstellung

Process for the preparation of finely divided oxygenated metal compounds

A paper pulp is impregnated with an aqueous solution of one or a number of metal compounds, the impregnated pulp is dried and is ashed. The ash is collected and ground. Powdered oxygenated metal compounds of submicron fineness are obtained which, after compression and sintering, yield sintered articles of high mechanical strength and with a high specific surface, especially refractory articles made of stabilised zirconia and catalyst supports.

PROCEDURE FOR THE PRODUCTION OF CERAMIC PLUTONIUM URANIUM NUCLEUS FUEL IN THE FORM OF SINTER PELLETS.

Piezoelectric ceramics - for ultrasonic transducers contg silver-bismuth-lead-titanate-zirconates

Piezoelectric Ceramic Compositions

PROCESS FOR THE MANUFACTURE OF CERAMIC COMBUSTIBLE PASTILLES FOR NUCLEAR REACTORS

PROCEDE DE PREPARATION D'UN CORPS FACONNE PAR PRESSAGE A FROID D'UN GEL

L'invention concerne la préparation, sans poussières, de corps façonnés. Le façonnage comprend le pressage à froid d'une matière préparée par gélification (précipitation d'un gel, transformation d'une dispersion colloïdale en gel ou gélification interne) sans broyage préalable. Application : préparation de pastilles d'un combustible nucléaire.

Piezoceramic material - based on lead titanate

IMPROVEMENTS IN AND RELATING TO SEMICONDUCTOR MATERIALS

electro-mechanical transducer element

Piezoelectric compositions of ceramics

Manufactoring process of oxide ceramics of high density

Compressed bodies of mixed oxide of uranium and plutonium

On fabrique des comprimés d'oxyde mixte fritté de (U, Pu)O2 par broyage de pastilles en oxyde mixte qui ont une granulométrie inférieure à 3 mm. On broie très finement ce produit broyé en une poudre ayant une granulométrie moyenne d5 0 , 3 inférieure à 3 microns. On granule ensuite cette poudre et on la comprime en pastilles qui sont frittées en comprimés.

PROCESS FOR PRUDICNG UO2

METHOD FOR MAKING A TABLET OF AT LEAST ONE METAL OXIDE, ITS USE AS NUCLEAR FUEL

METHOD OF MANUFACTURING A PELLET OF THE AT LEAST ONE METAL OXIDE, ITS USE AS NUCLEAR FUEL

La présente invention se rapporte à un procédé de frittage d'une poudre compactée d'au moins un oxyde d'un métal choisi parmi un actinide et un lanthanide, ce procédé comprenant les étapes successives suivantes, réalisées dans un four et sous une atmosphère comprenant un gaz inerte, du dihydrogène et de l'eau : (a) une montée en température d'une température initiale Ti jusqu'à une température de palier TP (b) un maintien de la température à la température de palier TP, et (c) une descente en température depuis la température de palier TP jusqu'à une température finale TF, dans lequel le ratio P(H2)/P(H2O) est tel que : - 500 < P(H2)/P(H2O) ≤ 50000, lors de l'étape (a), de Ti jusqu'à atteindre une première température intermédiaire Ti1 entre 1000°C et TP, et - P(H2)/P(H2O) ≤ 500, au moins lors de l'étape (c), à partir d'une deuxième température intermédiaire Ti2 entre TP et 1000°C, jusqu'à atteindre TF. L'invention se rapporte également à un procédé de fabrication d'une pastille d'au moins ...

FINELY-DIVIDED METAL OXIDES AND SINTERED OBJECTS THEREFROM

Piezoelectric ceramic - contg lead titanate /zirconate and lead magnesium tungstate,giving high mechanical-electrical interc

DRYING OF MOIST MATERIAL

Mass production of uranium dioxide

METHOD OF PREPARING A POWDER COMPRISING URANIUM OXIDE UO2, OPTIONALLY PLUTONIUM OXIDE PUO2 AND OPTIONALLY AMO2 AMERICIUM OXIDE AND/OR AN OXIDE OF ANOTHER MINOR ACTINIDE MOIETY

Refractory matters and their manufactoring process

FERROELECTRIC MATERIALS

Production of ceramic powders for ferrite, spinel, titanate and garnet production

Improvements brought to the processes for the preparation of uranium carbide parts

Process of metallic oxide sintering

Procédé pour la fabrication de combustible nucléaire à base de monocarbure, en particulier de monocarbure d'uranium et d'uranium-plutonium.

A.LE PROCEDE CONSISTE A FAIRE REAGIR DES OXYDES DE MATIERE POUVANT CONSTITUER DES COMBUSTIBLES NUCLEAIRES AVEC UNE MATIERE CONTENANT DU CARBONE A UNE TEMPERATURE SUPERIEURE A 1300C. B.ON OBTIENT LE MONOCARBURE EN OPERANT LA REACTION AVEC DU DICARBURE D'URANIUM. C.CE PROCEDE PERMET DE FACILITER BEAUCOUP LES MANIPULATIONS ET D'EVITER DANS UNE LARGE MESURE LE DEGAGEMENT D'OXYDE DE CARBONE QUI AFFECTE LA DENSITE DES PELLETS ET PEUT PROVOQUER DES FISSURES DANS LE COMBUSTIBLE FINI.

ELECTROMECHANICAL RESONATOR

COMPLEX OXIDIC COMPOUNDS AND PROCESS FOR THEIR PRODUCTION

METHOD FOR PRODUCING LEAD ZIRCONATE-TITANATE TRANSDUCER MATERIALS BY SLIP CASTING

PREPARATION OF FERROELECTRIC CERAMIC COMPOSITIONS

PIEZOELECTRIC TRANSFORMER

A body of ceramic piezoelectric material of the lead titanate, lead zirconate type with an additive of the iron oxide type is provided having regions electroded and polarized such that the electrical impedances are markedly different. High voltage transformations are obtained in this manner between input and output electrodes. A third set of electrodes coupled to one of the other sets of electrodes enables the transformer to accomplish self-oscillation. In order to enable the body to be supported at more than one vibration node, the body is caused to vibrate at a harmonic of its fundamental frequency of vibration or more precisely in a mode with one full acoustic wavelength along the ceramic body, or two or more half wavelengths.

Process for the production of spherical fuel and fertile particles

Uniform spherical fuel and/or fertile particles are formed by conversion of an oscillating liquid stream of a uranium and/or thorium compound solution flowing from at least one nozzle in an amount of more than 3,000 drops per minute by allowing these drops to fall into an ammonia solution and subsequently drying and sintering the particles thus formed. Before immersion in the ammonia solution the drops are first allowed to pass through a falling zone free of ammonia, this zone is so regulated that the drops have taken on their exact spherical form and then the drops are passed through a second falling zone containing flowing ammonia gas, whereby the ammonia gas is introduced into this second falling zone through at least one inlet conduit in such manner that there is guaranteed not only an ammonia gas flow in the opposite direction to that of the falling drops but also a horizontal cross current of the ammonia gas through the space between the drops and this second falling zone is so regulated ...

Process for the production of sintered nuclear fuel pellets from precipitated solutions with the aid of hydrogen peroxide in an acid medium

Process for obtaining fritted oxide pellets of the MxOy type for nuclear fuels from solutions of soluble salts of the element or elements M, involving stage of precipitating the elements M by hydrogen peroxide in an acid medium. During this precipitation, there is an instantaneous dispersion of one of the reagents (solution of salts or peroxide) in the other, in order to obtain a homogenous mixture and an also instantaneous precipitation of the nuclei in a continuous liquid phase confined in an enclosure having minimum dimensions, the mother liquors being rapidly exhausted. The process makes it possible to obtain sintered pellets whose density exceeds 96% of the theoretical density.

PIEZOELECTRIC CERAMIC MATERIALS

Verfahren zur Herstellung eines Pu-UC-Kernbrennstoffs und dadurch erhaltene Produkte

Keramisches Ferroelektrikum mit Bleititanat-Bleizirkonat

Piezoelektrisches keramisches Material

VERFAHREN ZUR HERSTELLUNG VON METALLKARBID ENTHALTENDEN MIKROKUEGELCHEN AUS METALLBELADENEN HARZPERLEN

VERFAHREN ZUM HERSTELLEN ELEKTROOPTISCHER KERAMIK

HERSTELLUNG VON KERAMISCHEN GEGENSTÄNDEN

Chloride, bromide and iodide scintillators with europium doping

A halide scintillator material is disclosed where the halide may comprise chloride, bromide or iodide. The material is single-crystalline and has a composition of the general formula ABX 3 where A is an alkali, B is an alkali earth and X is a halide which general composition was investigated. In particular, crystals of the formula ACa 1-y Eu y I 3 where A=K, Rb and Cs were formed as well as crystals of the formula CsA 1-y Eu y X 3 (where A=Ca, Sr, Ba, or a combination thereof and X═Cl, Br or I or a combination thereof) with divalent Europium doping where 0≦y≦1, and more particularly Eu doping has been studied at one to ten mol %. The disclosed scintillator materials are suitable for making scintillation detectors used in applications such as medical imaging and homeland security.

Scintillation crystal including a rare earth halide, and a radiation detection system including the scintillation crystal

A scintillation crystal can include Ln (1-y )RE y X 3 , wherein Ln represents a rare earth element, RE represents a different rare earth element, y has a value in a range of 0 to 1, and X represents a halogen. In an embodiment, RE is Ce, and the scintillation crystal is doped with Sr, Ba, or a mixture thereof at a concentration of at least approximately 0.0002 wt. %. In another embodiment, the scintillation crystal can have unexpectedly improved linearity and unexpectedly improved energy resolution properties. In a further embodiment, a radiation detection system can include the scintillation crystal, a photosensor, and an electronics device. Such a radiation detection system can be useful in a variety of radiation imaging applications.

SOLUTION-BASED SYNTHESIS OF CsSnI3

This invention discloses a solution-based synthesis of cesium tin tri-iodide (CsSnI 3 ) film. More specifically, the invention is directed to a solution-based drop-coating synthesis of cesium tin tri-iodide (CsSnI 3 ) films. CsSnI 3 films are ideally suited for a wide range of applications such as light emitting and photovoltaic devices.

Multiple inorganic compound structure and use thereof, and method of producing multiple inorganic compound structure

In a multiple inorganic compound structure according to the present invention, elements included in a main crystalline phase and elements included in a sub inorganic compound are present in at least a first region and a second region, the first region and the second region each have an area of nano square meter order, the first region is adjacent to the second region, and the first region and the second region each include an element of an identical kind, which element of the identical kind present in the first region has a concentration different from that of the element of the identical kind present in the second region.

NOVEL CERMETS FROM MOLTEN METAL INFILTRATION PROCESSING

New cermets with improved properties and applications are provided. These new cermets have lower density and/or higher hardness than B4C cermet. By incorporating other new ceramics into B4C powders or as a substitute for B4C, lower densities and/or higher hardness cermets result. The ceramic powders have much finer particle size than those previously used which significantly reduces grain size of the cermet microstructure and improves the cermet properties. 1. A cermet , comprising:a porous ceramic preform matrix comprising ceramic powder that includes nano-powder size particles, wherein said ceramic powder comprises a blend of boron carbide, aluminum boride and magnesium boride, wherein said material comprises a density that is greater than 55%; andmetal alloy located in the pores of said porous ceramic perform matrix.2. The cermet of claim 1 , wherein said nano-powder sized particles comprise a particle size within a range from about 40 nm to about 900 nm.3. The cermet of claim 1 , wherein said matrix comprises porosity within a range from about 20% to about 50%.4. The cermet of claim 1 , wherein said ceramic powder comprises a nitride.5. The cermet of claim 1 , wherein said alloy comprises a combination of elements selected from the group consisting of Al claim 1 , Mg claim 1 , Be claim 1 , Li claim 1 , Ti and V.6. The cermet of claim 1 , wherein said alloy comprises a density of less than 2.8 gm/cc.7. The cermet of claim 1 , wherein said size of each particle of said particles is about the same as that of all other said particles.8. The cermet of claim 1 , wherein said alloy is able to wet said matrix at a temperature of less than 1150° C.9. The cermet of claim 1 , wherein said alloy is able to wet said matrix at a temperature of less than 1150° C. within an infiltration period of less than 3 hours.10. The cermet of claim 1 , wherein said matrix has been cold pressed to comprise said density that is greater than 55%.11. The cermet of claim 1 , wherein said ...

METHOD OF PRODUCING CARBON NANOPARTICLES AND METHOD OF PRODUCING ALUMINUM-CARBON COMPOSITE MATERIAL

Provided is a method of producing carbon nanoparticles, involving: applying a mechanical shearing force to a graphite material in a ball mill container combined with a disc, the ball mill container configured to be rotatable in a first direction, and the disc configured to be rotatable in a second direction opposite to the first direction; and separating produced carbon nanoparticles from the graphite material. A method of producing an aluminum-carbon composite material, and an aluminum-carbon composite material obtained by such a method are also provided. 1. A method of producing carbon nanoparticles , the method comprising:applying a mechanical shearing force to a graphite material in a ball mill container combined with a disc, the ball mill container configured to be rotatable in a first direction, and the disc configured to be rotatable in a second direction opposite to the first direction; andseparating produced carbon nanoparticles from the graphite material.2. The method according to claim 1 , wherein 80% wt or more of the produced carbon nanoparticles separated from the graphite material are plate-type carbon materials formed of a single layer to 30 layers of carbon atomic layers.3. The method according to claim 1 , wherein the mechanical shearing force is applied to the graphite material by placing the graphite material and ball mill balls in the ball mill container combined with a disc and rotating the disc and the ball mill container for a predetermined time to allow the ball mill balls to generate friction with a wall of the ball mill container and rotate by themselves.4. The method according to claim 1 , wherein the graphite material comprises at least one or more selected from the group consisting of a plate-type artificial graphite material claim 1 , a powder-type artificial graphite material claim 1 , a lump artificial graphite material claim 1 , a plate-type natural graphite material claim 1 , a powder-type natural graphite material claim 1 , and a ...

Nitride Nuclear Fuel and Method for Its Production

The invention relates to a nitride nuclear fuel characterized in that the nitride fuel is a pellet of a material with a single-phase solid solution of elements comprising at least a nitride of americium (Am), and that the material has a density of around 90% of the theoretical density. The invention further relates to a method for producing the said nuclear fuel by using the steps: mixing of starting powders, sintering of the powders into a dense pellet and a subsequent heat treatment.

PRESSED AND SELF SINTERED POLYMER DERIVED SiC MATERIALS, APPLICATIONS AND DEVICES

Organosilicon chemistry, polymer derived ceramic materials, and methods. Such materials and methods for making polysilocarb (SiOC) and Silicon Carbide (SiC) materials having 3-nines, 4-nines, 6-nines and greater purity. Processes and articles utilizing such high purity SiOC and SiC. 127-. (canceled)28. A filled silicon carbide composition comprising:a. polymer derived SiC particles;b. wherein the particles consist essentially of a ceramic having a filler bound into the ceramic;c. wherein the filler is selected to provide a predetermined property to a silicon carbide wafer; and,d. wherein the particles have less than 0.001% impurities.29. The silicon carbide composition of claim 28 , wherein the filler comprises a dopant.30. The silicon carbide composition of claim 28 , wherein the filler is a dopant.31. The silicon carbide composition of claim 29 , wherein the predetermined property is a band gap.32. The silicon carbide composition of claim 29 , wherein the predetermined property is a band gap.33. The silicon carbide composition of claim 29 , wherein the predetermined property is a p-n junction.34. The silicon carbide composition of claim 29 , wherein the predetermined property is a semiconductor feature.35. The silicon carbide composition of claim 29 , wherein the predetermined property is a p-type feature.36. The silicon carbide composition of claim 29 , wherein the predetermined property is a n-type feature.37. A filled polysilocarb composition comprising:a. polymer derived SiOC particles;b. wherein the particles consist essentially of a ceramic having a filler bound into the ceramic;c. wherein the filler is selected to provide a predetermined property to a silicon carbide wafer; and,d. wherein the particles have less than 0.001% impurities.38. The polysilocarb composition of claim 37 , wherein the filler comprises a dopant.39. The polysilocarb composition of ; wherein the filler is a dopant.40. The polysilocarb composition of ; wherein the predetermined property ...

Scintillation crystal, a radiation detection system including the scintillation crystal, and a method of using the radiation detection system

A scintillation crystal can include Ln (1-y) RE y X 3 , wherein Ln represents a rare earth element, RE represents a different rare earth element, y has a value in a range of 0 to 1, and X represents a halogen. In an embodiment, RE is Ce, and the scintillation crystal is doped with Sr, Ba, or a mixture thereof at a concentration of at least approximately 0.0002 wt. %. In another embodiment, the scintillation crystal can have unexpectedly improved linearity and unexpectedly improved energy resolution properties. In a further embodiment, a radiation detection system can include the scintillation crystal, a photosensor, and an electronics device. Such a radiation detection system can be useful in a variety of radiation imaging applications.

METHOD AND APPARATUS FOR OXIDATION OF TWO-DIMENSIONAL MATERIALS

In accordance with an example embodiment of the present invention, a method is disclosed. The method comprises providing a two-dimensional object comprising a lll-V group material, e.g. Boron nitride (BN), Boron carbon nitride (BCN), Aluminium nitride (AIN), Gallium nitride (GaN), Indium Nitride (InN), Indium phosphide (InP), Indium arsenide (InAs), Boron phosphide (BP), Boron arsenide (BAs), and Gallium phosphide (GaP) and/or a Transition Metal Dichalcogenides (TMD) group material, e.g Molybdenum sulfide (MoS2), Molybdenum diselenide (MoSe2), Tungsten sulfide (WS2), Tungsten diselenide (WSe2), Niobium sulfide (NbS2), Vanadium sulfide (VS2,), and Tantalum sulfide (TaS2) into an environment comprising oxygen; and exposing at least one part of the two-dimensional object to photonic irradiation in said environment, thereby oxidizing at least part of the material of the exposed part of the two-dimensional object. 120-. (canceled)21. A method , comprising:providing a two-dimensional object comprising a III-V group material and/or a Transition Metal Dichalcogenides (TMD) group material into an environment comprising oxygen; andexposing at least one part of the two-dimensional object to photonic irradiation in said environment, thereby oxidizing at least part of the material of the exposed part of the two-dimensional object.22. The method of claim 21 , further comprising:providing a substrate, andprior to providing the two-dimensional object into an environment comprising oxygen, depositing the III-V group material and/or the TMD group material onto the substrate, thereby forming the two-dimensional object comprising the III-V group material and/or the Transition Metal Dichalcogenides (TMD) group material.23. The method of claim 22 , wherein depositing the III-V group material and/or the TMD group material onto the substrate is performed by at least one of the following techniques: spray coating claim 22 , spin-coating claim 22 , drop-coating claim 22 , thin film transfer ...

Sintering material, and powder for manufacturing sintering material

The present invention is a sintering material including a granule, the sintering material having an apparent tap density of 1.0 to 2.5 g/cm 3 , a 50% cumulative volume particle diameter (D 50N ) of 10 to 100 μm as measured before ultrasonication by laser diffraction/scattering particle size distribution analysis, a 50% cumulative volume particle diameter (D 50D ) of 0.1 to 1.5 μm as measured after ultrasonication at 300 W for 15 minutes by laser diffraction/scattering particle size distribution analysis, and an X-ray diffraction pattern in which the maximum peak observed in the 20 angle range of from 20° to 40° is assigned to a rare earth oxyfluoride of the form LnOF when analyzed by X-ray diffractometry using Cu—Kα or Cu—Kα 1 rays.

Preceramic resin formulations, impregnated fibers comprising the preceramic resin formulations, composite materials, and related methods

A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 μm and second particles having an average mean diameter of from about 1.5 μm to about 5 μm. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed.

Preceramic resin formulations, ceramic materials comprising the preceramic resin formulations, and related articles and methods

A preceramic resin formulation comprising a polycarbosilane preceramic polymer and an organically modified silicon dioxide preceramic polymer. A ceramic material comprising a reaction product of the polycarbosilane preceramic polymer and organically modified silicon dioxide preceramic polymer is also described. Articles comprising the ceramic material are also described, as are methods of forming the preceramic resin formulation and the ceramic material.

MANUFACTURING OF A CERAMIC ARTICLE FROM A METAL PREFORM OR METAL MATRIX COMPOSITE PREFORM PROVIDED BY 3D-PRINTING OR 3D-WEAVING

The present invention relates to a method of manufacturing a ceramic article () from a metal or metal matrix composite preform () provided by 3D-printing or by 3D-weaving. The preform () is placed in a heating chamber (), and a predetermined time-temperature profile is applied in order to controllably react the preform () with a gas introduced into the heating chamber (). The metal, the gas and the time-temperature profile are chosen so as to induce a metal-gas reaction resulting in at least a part of the preform () transforming into a ceramic. Preferred embodiments of the invention comprises a first oxidation stage involving a metal-gas reaction in order to form a supporting oxide layer () at the surface of the metal, followed by a second stage in which the heating chamber () is heated to a temperature above the melting point of the metal to increase the kinetics of the chemical reaction. The invention also relates to a number of advantageous uses of a ceramic article manufactured as described. 2. Method according to claim 1 , wherein the preform 3D-printed using an additive manufacturing method selected from the group consisting of powder-bed claim 1 , blown-powder and wire-fed.3. Method according to claim 1 , wherein the 3D-printing process deploys one or more heat sources selected from the group consisting of: laser claim 1 , electron beam claim 1 , plasma and incoherent light claim 1 , to melt the metal.4. Method according to claim 1 , wherein the metal pre-form is 3D-printed into a shape selected from the group consisting of: a lattice claim 1 , an open cellular foam claim 1 , a porous article claim 1 , a mould and die.5. Method according to claim 1 , wherein the time-temperature profile comprises a first oxidation stage in which the heating chamber is heated to below the melting point of the metal to allow metal-gas reaction in order to form a supporting oxide layer at the surface of the metal claim 1 , followed by a second stage in which the heating chamber ...

Ceramic Composite Materials and Methods

Provided herein are methods of making composite materials. The methods may include infiltrating a carbon nanoscale fiber network with a ceramic precursor, curing the ceramic precursor, and/or pyrolyzing the ceramic precursor. The infiltrating, curing, and pyrolyzing steps may be repeated one or more times. Composite materials also are provided that include a ceramic material and carbon nanoscale fibers.

Sulfide Solid Electrolyte and Battery

A novel sulfide solid electrolyte containing Li, P, S, and a halogen, which can be used as a solid electrolyte for a lithium secondary battery or the like, and is able to suppress the generation of a hydrogen sulfide gas even when exposed to moisture in the atmosphere. The sulfide solid electrolyte comprises a crystal phase or a compound having an argyrodite-type structure and containing Li, P, S, and a halogen; and a compound composed of Li, Cl, and Br and having a peak at each position of 2θ=29.1°±0.5° and 33.7°±0.5° in an X-ray diffraction pattern. 1. A sulfide solid electrolyte comprisinga compound, referred to as “component A”, having an argyrodite-type structure and containing a lithium (Li) element, a phosphorus (P) element, a sulfur (S) element, and a halogen (X) element, anda compound, referred to as “component B”, composed of a lithium (Li) element, a chlorine (Cl) element, and a bromine (Br) element and having a peak at each position of 2θ=29.1±0.5° and 33.7°±0.5° in an X-ray diffraction pattern measured by an X-ray diffraction apparatus (XRD) using CuKα1 rays,wherein, when an intensity of a peak located at 2θ=30.2° 0.5° is defined as IA and an intensity of a peak located at 2θ=29.1°±0.5° is defined as IB, in an X-ray diffraction pattern measured by the X-ray diffraction apparatus (XRD) using CuKα1 rays, a ratio, Ia/IB of IA to IB satisfies 0 Подробнее

Heating Assembly

A heating assembly for a thermal joining device, the heating assembly including a base body, through which a fluid passage passes and which is provided on an external surface with a heating device having a ceramic substrate designed as a thick-film ceramic material and a metallic heating conductor, wherein the heating conductor is produced from an anti-adhesion alloy, and/or wherein the heating conductor is coated with an anti-adhesion alloy coating, the anti-adhesion alloy containing a proportion of at least 5 percent by weight of at least one element from the group of the metals of the rare earths. 1. A heating assembly for a thermal joining device , the assembly comprising a base body , through which a fluid passage passes and which is provided on an external surface with a heating device comprising a ceramic substrate designed as a thick-film ceramic material and a metallic heating conductor , wherein the heating conductor is produced from an anti-adhesion alloy , and/or wherein the heating conductor is coated with an anti-adhesion alloy coating , the anti-adhesion alloy containing a proportion of at least 5 percent by weight of at least one element from the group of the metals of the rare earths.2. The heating assembly according to claim 1 , wherein the heating conductor is applied to the ceramic substrate as an amorphous mass claim 1 , and joined to the substrate by adhesive force.3. The heating assembly according to claim 2 , wherein the heating conductor is applied to the ceramic substrate in a spraying or screen printing process or in a direct printing process.4. The heating assembly according to claim 2 , wherein the heating conductor is joined to the substrate involving thermal effects claim 2 ,5. The heating assembly according to claim 1 , wherein the heating conductor is produced from a strip material.6. The heating assembly according to claim 1 , wherein an intermediate layer is placed between the substrate and the heating conductor for the improvement ...

ARTICLES FOR CREATING HOLLOW STRUCTURES IN CERAMIC MATRIX COMPOSITES

The present disclosure relates to a method of fabricating a ceramic composite components. The method may include providing at least a first layer of reinforcing fiber material which may be a pre-impregnated fiber. An additively manufactured component may be provided on or near the first layer. A second layer of reinforcing fiber, which may be a pre-impregnated fiber may be formed on top the additively manufactured component. A precursor is densified to consolidates at least the first and second layer into a densified composite, wherein the additively manufactured material defines at least one cooling passage in the densified composite component. 113-. (canceled)14. A method of fabricating a composite component comprising:at least partially covering a core having an organic binder and at least one of Si, SiO, and SiO2 with a reinforcing fiber material, wherein the core defines at least one cooling passage in the composite component.15. The method for fabricating a composite component of claim 14 , wherein the core is formed by:(a) contacting a cured portion of a workpiece with a liquid photopolymer;(b) irradiating a portion of the liquid photopolymer adjacent to the cured portion through a window contacting the liquid photopolymer;(c) removing the workpiece from the uncured liquid photopolymer; and(d) repeating steps (a)-(c) until the core is formed.16. The method of fabricating a composite component of claim 14 , further comprising:performing an infiltration process with a ceramic matrix precursor material, wherein the precursor is densified and consolidates at least a first and second layer of the reinforcing fiber material into a densified composite, wherein the core defines at least one cooling passage in the densified composite component.17. The method of fabricating a composite component of claim 14 , wherein the reinforcing fiber material is pre-impregnated with a ceramic matrix precursor material.18. The method of fabricating a composite component of claim 14 ...

METHODS FOR FABRICATING THREE-DIMENSIONAL METALLIC OBJECTS VIA ADDITIVE MANUFACTURING USING METAL OXIDE PASTES

Methods of forming three-dimensional metallic objects are provided. A metal oxide paste comprising metal oxide particles, a polymeric binder and an organic solvent is extruded through a tip to deposit sequential layers of the metal oxide paste on a substrate to form a three-dimensional metal oxide object. The three-dimensional metal oxide object is exposed to a reducing gas at a temperature and for a period of time sufficient to reduce and to sinter the metal oxide particles to form a three-dimensional metallic object. Depending upon the composition of the metal oxide paste, the three-dimensional metallic object may be composed of a single metal, a simple or complex metal-metal alloy, or a metal-ceramic composite. 1. A method of forming a three-dimensional metallic object , the method comprising:(a) extruding a paste comprising metal oxide particles or non-oxide metal ceramic particles; a polymeric binder; and an organic solvent, through a tip to deposit sequential layers of the paste on a substrate, whereby a three-dimensional metal oxide object or a three-dimensional non-oxide metal ceramic object is formed on the substrate, and(b) exposing the three-dimensional metal oxide object or the three-dimensional non-oxide metal ceramic object to a reducing gas at a temperature and for a period of time sufficient to reduce and to sinter the metal oxide particles or the non-oxide metal ceramic particles, whereby the three-dimensional metallic object is formed.2. The method of claim 1 , wherein the paste is a metal oxide paste comprising the metal oxide particles claim 1 , the polymeric binder and the organic solvent.3. The method of claim 2 , wherein the metal oxide particles are iron oxide particles claim 2 , copper oxide particles claim 2 , nickel oxide particles claim 2 , cobalt oxide particles claim 2 , manganese oxide particles claim 2 , zinc oxide particles or combinations thereof.4. The method of claim 2 , wherein the metal oxide paste comprises two or more ...

SENSOR FOR DETERMINING GAS PARAMETERS

A high-temperature sensor, having at least one completely ceramic heater and at least one first sensor structure arranged on a first side of the completely ceramic heater, at least in areas. And a method for producing a sensor. 115-. (canceled)16. A high-temperature sensor , comprising:at least one completely ceramic heater; andat least one first sensor structure arranged on a first side of the completely ceramic heater, at least in areas.17. The sensor according to claim 16 , wherein the completely ceramic heater comprises:at least one electrically conductive ceramic; wherein the electrically conductive ceramic makes contact with electrodes in at least two positions separate from one another; andat least one electrically insulating ceramic, wherein the electrically insulating ceramic completely encloses the electrically conductive ceramic.18. The sensor according to claim 17 , wherein the electrically conductive ceramic comprises ceramic powders comprising silicide claim 17 , carbonate claim 17 , and/or nitride powder claim 17 , and at least one element from the tungsten claim 17 , tantalum claim 17 , niobium claim 17 , titanium claim 17 , molybdenum claim 17 , zirconium claim 17 , hafnium claim 17 , vanadium claim 17 , and/or chromium group claim 17 , and in that the electrically insulating ceramic is formed from heat-conducting ceramic powders comprising silicon nitride and/or aluminum nitride.19. The sensor according to claim 16 , wherein the completely ceramic heater has a thickness between 0.5 mm and 1.5 mm.20. The sensor according to claim 16 , wherein the sensor comprises:at least one first insulating layer arranged on the first side of the completely ceramic heater, at least in areas; and/orat least one second insulating layer arranged, at least in areas, on a second side of the completely ceramic heater, which is opposite the first side.21. The sensor according to claim 20 , wherein the first insulating layer and/or the second insulating layer comprises an ...

Sintered body

A sintered material is provided having a phase of a compound at least containing a rare earth element and fluorine, the sintered material having an L* value of 70 or more in the L*a*b* color space. The crystal grains of the sintered material preferably has an average grain size of 10 μm or less. The sintered material preferably has a relative density of 95% or more. The sintered material preferably has a three-point flexural strength of 100 MPa or more. The sintered material preferably contains no oxygen, or preferably has an oxygen content of 13% by mass or less when containing oxygen. The compound is preferably rare earth element fluoride or oxyfluoride.

Vapor Deposition Apparatus and Techniques Using High Purity Polymer Derived Silicon Carbide

Organosilicon chemistry, polymer derived ceramic materials, and methods. Such materials and methods for making polysilocarb (SiOC) and Silicon Carbide (SiC) materials having 3-nines, 4-nines, 6-nines and greater purity. Vapor deposition processes and articles formed by those processes utilizing such high purity SiOC and SiC. 110-. (canceled)11. A method of making boule for the production of a 4H N-Type silicon carbide wafer , having a diameter of from about 6 inches to about 10 inches , the wafer characterized with properties comprising:type/dopant:N/nitrogen;orientation:<0001>4.0°±0.5°;thickness: about 300 to about 800 μm; and,{'sup': '−2', 'micropipe density of <1 cm; and,'}the method comprising the steps of: forming a vapor of a polymer derived ceramic SiC starting material, wherein the polymer derived ceramic SiC starting material has a purity of at least about 6 nines, and is oxide layer free; depositing the vapor on a seed crystal to form a boule; and providing the boule to a wafer manufacturing process.121. The method of claim , wherein the wafer is further characterized with a property comprising RT 0.02-0.2 Ω·cm.131. The method of claim , wherein the wafer is further characterized with a property comprising RT 0.01-0.1 Ω·cm141. The method of claim , wherein the wafer is further characterized with a property comprising RT: 0.1-40 Ω·cm15. The methods of , , or , wherein the seed comprises a polymer derived ceramic SiC.16. The method of wherein the wafer manufacturing process produces a wafer having improved features claim 11 , when compared to a wafer made from a non-polymer derived SiC material.17. The method of wherein the wafer manufacturing process produces a wafer having improved features claim 12 , when compared to a wafer made from a non-polymer derived SiC material.18. The method of wherein the wafer manufacturing process produces a wafer having improved features claim 13 , when compared to a wafer made from a non-polymer derived SiC material.19. The ...

Polymer Derived Ceramic Equipment for the Exploration and Recovery of Resources

Apparatus and method for developing polymer derived ceramic downhole equipment including completion structure, isolation plugs, hanger systems, marine risers, risers, packer assemblies and sucker rods. In various approaches, one or more of downhole components, surfaces or structure can embody polymer derived ceramic material, and, in particular, polysilocarb derived material and polysilocarb derived ceramic material. 1. A system for the production of natural resources from formation within the earth , comprising: downhole equipment , wherein components of the downhole equipment are formed at least in part from polymer derived ceramic material.2. The system of claim 1 , wherein the system includes a drill head formed from polymer derived ceramic material.3. The system of claim 1 , wherein the system includes a drill pipe formed from polymer derived ceramic material.4. The system of claim 1 , wherein the system includes a surface casing formed from polymer derived ceramic material.5. The system of claim 1 , wherein the system includes a tubular casing formed from polymer derived ceramic material.6. The system of claim 1 , wherein the system includes a completion assembly formed from polymer derived ceramic material.7. The system of claim 1 , wherein the system includes a liner hanger assembly formed from polymer derived ceramic material.8. The system of claim 1 , wherein the system includes one or multilateral assemblies formed from polymer derived ceramic material.9. The system of claim 1 , wherein the system includes one or more packer assemblies formed from polymer derived ceramic material.10. The system of claim 1 , wherein the system includes a sucker rod assembly formed from polymer derived ceramic material.11. The system of claim 1 , wherein the polymer derived ceramic material is a polysilocarb derived ceramic material.12. The system of claim 11 , wherein the polysilocarb formulation is a reaction type formulation.13. The system of claim 11 , wherein the ...

Silicon carbide multilayered cladding and nuclear reactor fuel element for use in water-cooled nuclear power reactors

A nuclear fuel element for use in water-cooled nuclear power reactors and an improved multilayered silicon carbide tube for use in water-cooled nuclear power reactors and other high temperature, high strength thermal tubing applications including solar energy collectors. The fuel element includes a multilayered silicon carbide cladding tube. The multilayered silicon carbide cladding tube includes (i) an inner layer; (ii) a central layer; and (iii) a crack propagation prevention layer between the inner layer and the central layer. A stack of individual fissionable fuel pellets may be located within the cladding tube. In addition, a thermally conductive layer may be deposited within the cladding tube between the inner layer of the cladding tube and the stack of fuel pellets. The multilayered silicon carbide cladding tube may also be adapted for other high temperature, high strength thermal tubing applications including solar energy collectors.

THERMOELECTRIC CONVERSION MATERIAL, THERMOELECTRIC CONVERSION ELEMENT, THERMOELECTRIC CONVERSION MODULE, AND METHOD FOR MANUFACTURING THERMOELECTRIC CONVERSION MATERIAL

A thermoelectric conversion material formed of a sintered body containing magnesium silicide as a main component contains 0.5 mass % or more and 10 mass % or less of aluminum oxide. The aluminum oxide is distributed at a crystal grain boundary of the magnesium silicide. 1. A thermoelectric conversion material formed of a sintered body containing magnesium silicide as a main component , the thermoelectric conversion material comprising 0.5 mass % or more and 10 mass % or less of aluminum oxide ,wherein the aluminum oxide is distributed at a crystal grain boundary of the magnesium silicide.2. The thermoelectric conversion material according to claim 1 , further comprising one or more elements selected from a group consisting of Li claim 1 , Na claim 1 , K claim 1 , B claim 1 , Ga claim 1 , In claim 1 , N claim 1 , P claim 1 , As claim 1 , Sb claim 1 , Bi claim 1 , Ag claim 1 , Cu claim 1 , and Y claim 1 , as a dopant.3. The thermoelectric conversion material according to claim 1 , wherein the thermoelectric conversion material is formed of the sintered body of magnesium silicide free of a dopant.4. The thermoelectric conversion material according to claim 1 , further comprising aluminum.5. The thermoelectric conversion material according to claim 4 ,wherein a concentration of aluminum in a crystal grain of the sintered body is 0.005 atom % or more and 0.20 atom % or less.6. The thermoelectric conversion material according to claim 1 ,wherein a concentration of aluminum in a crystal grain of the sintered body is 0.5 atom % or more and 2 atom % or less, the concentration being obtained by analyzing an inside of the crystal grain of the sintered body with SEM-EDX with an acceleration voltage of 3 kV after heating to 600° C. in a steam atmosphere under pressure of 200 Pa, retaining at 600° C. for 10 minutes, and cooling to 25° C.7. A thermoelectric conversion material formed of a sintered body containing magnesium silicide as a main component claim 1 ,{'sub': 2', 'x', '1- ...

Heat-transforming ceramic roasting cylinder and coffee bean roaster using the same

A heat-transforming ceramic roasting cylinder and a coffee bean roaster using the same are provided. The ceramic roasting cylinder is made by grinding and mixing ball clay, kaolin clay, mullite, spodumene, and an energy ceramic material into a clay blank; molding the clay blank into ceramic green bodies; and sintering the ceramic green bodies at 1250˜1320° C. for 18˜24 hours. The ceramic roasting cylinder has an internal roasting space where coffee beans are loaded. The ceramic roasting cylinder also has evenly distributed capillary pores through which heat can circulate to induce the energy ceramic material in the roasting cylinder to release negative ions and far-infrared rays. The far-infrared rays can reduce the van der Waals forces between the oil molecules in the coffee beans instantly, splitting large oil molecules into smaller ones, ensuring the oil in the beans are released sufficiently, evenly, and rapidly to the vicinity of the bean surface.

METHOD OF FABRICATING A CERAMIC COMPOSITE

A method of making a ceramic composite component includes providing a fibrous preform or a plurality of fibers, providing a first plurality of particles, coating the first plurality of particles with a coating to produce a first plurality of coated particles, delivering the first plurality of coated particles to the fibrous preform or to an outer surface of the plurality of fibers, and converting the first plurality of coated particles into refractory compounds. The first plurality of particles or the coating comprises a refractory metal. 1. A component for use in ultrahigh temperatures , the component comprising:a ceramic matrix; anda plurality of refractory compounds, wherein the refractory compounds comprise a refractory metal and wherein the refractory compounds constitute 12 to 80 percent by volume of the ceramic matrix.2. The component of claim 1 , wherein the plurality of refractory compounds comprises refractory carbides or refractory borides.3. The component of claim 2 , wherein the plurality of refractory compounds comprises refractory carbides or refractory borides containing unreacted carbon or boron cores claim 2 , respectively.4. The component of and further comprising a plurality of refractory oxides distributed on a surface of the component claim 2 , wherein the refractory oxides comprise a refractory metal. The component of claim 2 , wherein the ceramic matrix comprises silicon carbide.6. The component of claim 2 , wherein the component has an inner portion and an outer portion and wherein an average size of refractory compounds in the inner portion is smaller than an average size of refractory compounds in the outer portion. The component of claim 2 , wherein at least a subset of refractory compounds of the plurality of refractory compounds have a particle size less than 0.1 micrometers.8. The component of claim 1 , wherein at least a subset of refractory compounds of the plurality of refractory compounds have a particle size ranging from 10 ...

Method of densifying a ceramic matrix composite using a filled tackifier

A method of producing an enhanced ceramic matrix composite includes applying a tackifier compound to a fiber preform. The tackifier compound includes inorganic filler particles. The method further includes modifying the tackifier compound such that the inorganic filler particles remain interspersed throughout the fiber preform, and occupy pores of fiber preform.

Granulation of Fine Powder

A mixture of fine powder including thorium oxide was converted to granulated powder by forming a first-green-body and heat treating the first-green-body at a high temperature to strengthen the first-green-body followed by granulation by crushing or milling the heat-treated first-green-body. The granulated powder was achieved by screening through a combination of sieves to achieve the desired granule size distribution. The granulated powder relies on the thermal bonding to maintain its shape and structure. The granulated powder contains no organic binder and can be stored in a radioactive or other extreme environment. The granulated powder was pressed and sintered to form a dense compact with a higher density and more uniform pore size distribution. 1. A process for granulating fine powder , comprising:mixing a fine powder by dry mixing or we mixing, the fine powder comprising at least one radioactive compound, and thereafterforming a first-green-body from the mixed powder,heat treating the first-green-body to a high temperature to strengthen the shape and structure,forming granulated powder by crushing or milling the heat treated first-green-body, andfiltering the granulated powder.2. The process of claim 1 , wherein the step of forming a first-green-body comprises applying heat to the first-green-body between 100 to 2000° C. to improve its strength so that it maintains its shape and structure.3. The process of claim 2 , wherein the step of forming the first-green-body further comprises applying heat in a gaseous environment comprising at least one gas selected from nitrogen claim 2 , air claim 2 , argon claim 2 , helium or vacuum.4. The process of claim 1 , wherein the radioactive compound comprises a radioactive compound of Th claim 1 , Pa claim 1 , U claim 1 , Np claim 1 , Pu claim 1 , Am claim 1 , Cm claim 1 , or Bk.5. The process of claim 4 , wherein the radioactive compound comprises an oxide claim 4 , a nitride claim 4 , a fluoride claim 4 , a chloride claim ...

SYNTACTIC INSULATOR WITH CO-SHRINKING FILLERS

A thermally-insulating composite material with co-shrinkage in the form of an insulating material formed by the inclusion of microballoons in a matrix material such that the microballoons and the matrix material exhibit co-shrinkage upon processing. The thermally-insulating composite material can be formed by a variety of microballoon-matrix material combinations such as polymer microballoons in a preceramic matrix material. The matrix materials generally contain fine rigid fillers. 1. A thermally-insulating composite material formed from a filler in a polymer material , said filler including a shrinkable filler , said shrinkable filler exhibiting co-shrinkage with said polymer material , said polymer material including a thermosetting , curable polymer , said shrinkable filler including microspheres , said microspheres formed of a material that co-shrinks with said polymer material during pyrolization and/or curing of said polymer material , said filler constituting 1-74 vol. % of said thermally-insulating composite material prior to said pyrolization and/or curing of said polymer material , said polymer material constituting 20-99 vol. % of said thermally-insulating composite material prior to said pyrolization , and/or curing of said polymer material , said thermally-insulating composite material having a lower thermal conductivity than said polymer material , said polymer material forms a solid polymer and/or ceramic matrix system upon curing , pyrolization and/or carbonization.2. The thermally-insulating composite material as defined in claim 1 , wherein matrix pores formed at least partially from said filler constitute about 1-74 vol. % of said thermally-insulating composite material.3. The thermally-insulating composite material as defined in claim 1 , wherein said filler includes non-shrinkable fillers claim 1 , said non-shrinkable fillers selected from the group consisting of fibers claim 1 , whiskers claim 1 , nanofibers claim 1 , and nanotubes.4. The ...

TAPE CASTING USING SLURRY FROM A CAVITATION APPARATUS AND METHODS OF MAKING SAME

Provided in one embodiment is a method of making, comprising: applying a hydrodynamic cavitation process to a raw material comprising particles comprising a metal-containing material or a carbon containing material of a first size to produce a slurry having particles comprising the metal-containing material or the carbon-containing material of a second size, smaller than the first size; and tape casting the slurry to form a green tape. Apparatuses employed to apply the method and the exemplary compositions made in accordance with the method are also provided. 1. A method comprising:applying a hydrodynamic cavitation process to a raw material comprising particles comprising a metal-containing material or a carbon-containing material of a first average size to produce a slurry having particles comprising the metal-containing material or the carbon-containing of a second average size, smaller than the first size; andtape casting the slurry to form a green tape.2. The method of claim 1 , further comprising:controlling a temperature of the raw material to be within about 10 degrees Celsius to about 90 degrees Celsius before and after the hydrodynamic cavitation process.3. The method of claim 1 , further comprising repeating applying the hydrodynamic cavitation process at least once to the slurry to further reduce the size of the metal-containing particles to a third average size claim 1 , smaller than the second average size claim 1 , prior to tape casting the slurry to form the green tape.4. The method of claim 1 , wherein the hydrodynamic cavitation process further comprises:subjecting the raw material to a hydraulic pressure of about 1,000 psi to about 65,000 psi.5. The method of claim 1 , wherein the slurry is produced at a rate of about 0.1 liters per minute to about 5 liters per minute.6. The method of claim 1 , wherein the raw material further comprises at least one of a deflocculant claim 1 , a binder claim 1 , and a plasticizer.7. The method of claim 1 , wherein ...

Rapid ceramic matrix composite fabrication of aircraft brakes via field assisted sintering

A method of making a ceramic matrix composite (CMC) brake component may include the steps of applying a pressure to a mixture comprising ceramic powder and chopped fibers, pulsing an electrical discharge across the mixture to generate a pulsed plasma between particles of the ceramic powder, increasing a temperature applied to the mixture using direct heating to generate the CMC brake component, and reducing the temperature and the pressure applied to the CMC brake component. The ceramic powder may have a micrometer powder size or a nanometer powder size, and the chopped fibers may have an interphase coating.

SCINTILLATION CRYSTAL, A RADIATION DETECTION SYSTEM INCLUDING THE SCINTILLATION CRYSTAL, AND A METHOD OF USING THE RADIATION DETECTION SYSTEM

A scintillation crystal can include LnREX, wherein Ln represents a rare earth element, RE represents a different rare earth element, y has a value in a range of 0 to 1, and X represents a halogen. In an embodiment, RE is Ce, and the scintillation crystal is doped with Sr, Ba, or a mixture thereof at a concentration of at least approximately 0.0002 wt. %. In another embodiment, the scintillation crystal can have unexpectedly improved linearity and unexpectedly improved energy resolution properties. In a further embodiment, a radiation detection system can include the scintillation crystal, a photosensor, and an electronics device. Such a radiation detection system can be useful in a variety of radiation imaging applications. 1. A scintillation crystal , comprising:{'sub': 1-y', 'y', '3, 'claim-text': Ln represents a rare earth element selected from the group consisting of La, Gd, Y, Sc, Lu, and any mixture thereof;', 'RE represents a different rare earth element than Ln;', 'y has a value in a range of 0 to 1; and', 'X represents a halogen., 'a material including Ln()REX, wherein2. The scintillation crystal of claim 1 , wherein the material further contains Me and wherein Me represents Sr claim 1 , Br claim 1 , Ba claim 1 , Zn or any mixture thereof.3. The scintillation crystal of claim 1 , wherein RE is selected from the group consisting of Ce claim 1 , Eu claim 1 , Pr claim 1 , Tb claim 1 , Nd claim 1 , or any mixture thereof.4. The scintillation crystal of claim 1 , wherein the scintillation crystal has a property including:for a radiation energy range of 60 keV to 356 keV, the scintillation crystal has an average value for a departure from perfect linearity of no less than −0.35%.5. The scintillation crystal of claim 1 , wherein the scintillation crystal has a property including:for a radiation energy range of 2000 keV to 2600 keV, the scintillation crystal has an average value for a departure from perfect linearity of no greater than 0.07%;6. The scintillation ...

SILICON PARTICLES FOR BATTERY ELECTRODES

Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight of silicon particles. The silicon particles have an average particle size between about 0.1 μm and about 30 μm and a surface including nanometer-sized features. The composite material also includes greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases is a substantially continuous phase. 1. A method of forming a composite material , the method comprising:providing a mixture comprising a precursor and silicon particles; andpyrolysing the mixture to convert the precursor into one or more types of carbon phases to form the composite material,wherein at least one of the one or more types of carbon phases comprises a continuous phase that holds the composite material together such that the silicon particles are distributed throughout the composite material, andwherein the composite material comprises a material including silicon and carbon between the silicon particles and the one or more types of carbon phases.2. The method of claim 1 , wherein the material including silicon and carbon comprises silicon carbide.3. The method of claim 1 , wherein providing the mixture comprises providing a mixture comprising greater than 0% to about 90% by weight of the silicon particles claim 1 , and about 5% to about 80% by weight of the precursor.4. The method of claim 1 , wherein providing the mixture comprises providing conductive particles in the mixture.5. The method of claim 1 , wherein providing the mixture comprises providing metal particles in the mixture.6. The method of claim 1 , wherein the silicon particles are homogeneously distributed throughout the composite material.7. The ...

SILICON-BASED MATERIALS CONTAINING INDIUM AND METHODS OF FORMING THE SAME

A ceramic component is generally provided that includes a silicon-based layer comprising a silicon-containing material (e.g., a silicon metal and/or a silicide) and about 0.001% to about 85% of an In-containing compound. For example, the silicon-based layer can be a bond coating directly on the surface of the substrate. Alternatively or additionally, the silicon-based layer can be an outer layer defining a surface of the substrate, with an environmental barrier coating on the surface of the substrate. Gas turbine engines are also generally provided that include such a ceramic component. 1. A ceramic component comprising: a silicon-based bond coat comprising a silicon-containing material and about 0.001% to about 85% by volume of an In-containing compound.2. The ceramic component as in claim 1 , comprising:a substrate defining a surface, wherein the silicon-based layer is a bond coating directly on the surface of the substrate.3. The ceramic component as in claim 2 , wherein the silicon-containing material is silicon metal.4. The ceramic component as in claim 3 , wherein a thermally grown oxide is on the bond coating claim 3 , and wherein the thermally grown oxide layer remains amorphous up to an operating temperature of about 1415° C. or less.5. The ceramic component as in claim 2 , wherein the silicon-containing material comprises a silicide.6. The ceramic component as in claim 5 , wherein a thermally grown oxide is on the bond coating claim 5 , and wherein the thermally grown oxide layer remains amorphous up to an operating temperature of about 1485° C. or less.7. The ceramic component as in claim 5 , wherein the silicide comprises molybdenum silicide claim 5 , rhenium silicide claim 5 , a rare earth silicide claim 5 , or a mixture thereof.8. The ceramic component as in claim 1 , wherein the ceramic component comprising:a substrate, wherein the silicon-based layer is an outer layer defining a surface of the substrate; andan environmental barrier coating on the ...

RESIN FORMULATIONS FOR POLYMER-DERIVED CERAMIC MATERIALS

This disclosure enables direct 3D printing of preceramic polymers, which can be converted to fully dense ceramics. Some variations provide a preceramic resin formulation comprising a molecule with two or more C═X double bonds or C≡X triple bonds, wherein X is selected from C, S, N, or O, and wherein the molecule further comprises at least one non-carbon atom selected from Si, B, Al, Ti, Zn, P, Ge, S, N, or O; a photoinitiator; a free-radical inhibitor; and a 3D-printing resolution agent. The disclosed preceramic resin formulations can be 3D-printed using stereolithography into objects with complex shape. The polymeric objects may be directly converted to fully dense ceramics with properties that approach the theoretical maximum strength of the base materials. Low-cost structures are obtained that are lightweight, strong, and stiff, but stable in the presence of a high-temperature oxidizing environment. 1. A preceramic resin formulation comprising:(a) first molecules comprising two or more C═X double bonds, two or more C≡X triple bonds, or at least one C═X double bond and at least one C≡X triple bond, wherein X is selected from the group consisting of C, S, N, O, and combinations thereof, and wherein said first molecules further comprise at least one non-carbon atom selected from the group consisting of Si, B, Al, Ti, Zn, P, Ge, S, N, O, and combinations thereof;(b) second molecules comprising R—Y—H,wherein R is an organic group or an inorganic group,wherein for at least one of said second molecules, R includes an inorganic group containing an element selected from the group consisting of B, Al, Ti, Zn, P, Ge, S, N, O, and combinations thereof, andwherein Y is selected from the group consisting of S, N, O, and combinations thereof;(c) a photoinitiator;(d) a free-radical inhibitor; and(e) a 3D-printing resolution agent.2. The preceramic resin formulation of claim 1 , wherein said first molecules are present from about 3 wt % to about 97 wt % of said formulation.3. The ...

POROUS STRUCTURE WITH IMPROVED POROSITY, METHOD FOR PRODUCING THE POROUS STRUCTURE, POROUS HIERARCHICAL STRUCTURE AND METHOD FOR PRODUCING THE POROUS HIERARCHICAL STRUCTURE

A porous structure according to one embodiment of the present invention is constituted by a frame having a plurality of pores interconnected 3-dimensionally through a plurality of connecting passages. The plurality of pores defined by the frame are distributed in a closest packed state and are interconnected 3-dimensionally through a plurality of connecting passages in a symmetric structure, thus being effective in achieving a maximum porosity of the porous structure. A porous hierarchical structure according to one embodiment of the present invention includes a first porous structure having a plurality of 3-dimensionally interconnected first pores and a second porous structure having a plurality of 3-dimensionally interconnected second pores whose diameter is different from that of the first pores and surrounding and bonded to the first porous structure. A porous hierarchical structure according to a further embodiment of the present invention includes a frame having a plurality of 3-dimensionally interconnected first pores having a diameter in the micrometer range and a plurality of 3-dimensionally interconnected second pores formed around the first pores and whose diameter is smaller than that of the first pores. 1. A porous structure constituted by a frame having a plurality of pores interconnected 3-dimensionally through a plurality of connecting passages.2. The porous structure according to claim 1 , wherein the frame is made of a material selected from carbon materials claim 1 , metal materials claim 1 , and metal oxides.3. The porous structure according to claim 1 , wherein the pores have a diameter in the micrometer range.4. The porous structure according to claim 1 , wherein four connecting passages extend downwardly claim 1 , four connecting passages extend laterally claim 1 , and four connecting passages extend upwardly from the central pore.5. A method for producing a porous structure comprising (A) constructing and stacking a plurality of sacrificial ...

CERMET BODY

A cermet body, including a ceramic portion and a plurality of high magnetic permeability magnetic metallic particles distributed throughout the ceramic portion. Each respective high magnetic permeability magnetic metallic particle has a magnetic permeability of at least 0.0001 H/m. The magnetic metallic particles define a contiguous metallic phase, wherein the cermet body enjoys sufficient bulk electrical conductivity to be machined via electrical discharge machining. 1. A cermet body , comprising:a ceramic portion; anda plurality of high magnetic permeability magnetic metallic particles distributed throughout the ceramic portion, wherein each respective high magnetic permeability magnetic metallic particle has a magnetic permeability of at least 0.0001 H/m;wherein the magnetic metallic particles define a contiguous metallic phase; andwherein the cermet body enjoys sufficient bulk electrical conductivity to be machined via electrical discharge machining.2. The cermet body of wherein the magnetic metallic particles are mu-metal.3. The cermet body of wherein the cermet body is a green body.4. The cermet body of wherein the cermet body is a calcined body.5. The cermet body of wherein the cermet body has a porosity of no more than 0.8 percent and a density of no less than 99.2 percent theoretical.6. The cermet body of wherein the cermet body has a compressive strength of at least 2000 kPSI claim 1 , a modulus or at least 210 GPa claim 1 , and a minimum toughness of 12 MPa·m.7. The cermet body of wherein the cermet body is self-lubricating.8. The cermet body of wherein the body has sufficient bulk electrical conductivity to be EDM machinable.9. A densified cermet body claim 1 , comprising:a ceramic matrix; anda plurality of high magnetic permeability metallic particles distributed throughout the ceramic matrix and defining a contiguous metallic phase, wherein each respective high magnetic permeability metallic particle has a magnetic permeability of at least 0.01 H/m and ...

Ceramic matrix composite reinforced material

A CMC article may include a CMC substrate defining a major surface and a plurality of CMC reinforcing pins at least partially embedded in the CMC substrate. Each CMC reinforcing pin of the plurality of CMC reinforcing pins defines a respective long axis. The respective long axes may be oriented at an angle substantially perpendicular to the major surface of the CMC substrate. A method may include inserting a plurality of CMC reinforcing pins into a major surface of a ceramic fiber preform. Each CMC reinforcing pin of the plurality of CMC reinforcing pins defines a respective long axis. As the plurality of CMC reinforcing pins are inserted into the major surface, the respective long axes may be oriented at an angle substantially perpendicular to the major surface. The method also includes forming a matrix of material within pores of the ceramic fiber preform to form a CMC article.

SILICON PARTICLES FOR BATTERY ELECTRODES

Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight of silicon particles. The silicon particles have an average particle size between about 0.1 μm and about 30 μm and a surface including nanometer-sized features. The composite material also includes greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases is a substantially continuous phase. 1. A composite material , comprising:greater than 0% and less than about 90% by weight of silicon particles; andgreater than 0% and less than about 90% by weight of one or more types of carbon phases, andwherein at least one of the one or more types of carbon phases is a substantially continuous phase that holds the composite material together such that the silicon particles are distributed throughout the composite material.2. The composite material of claim 1 , wherein the silicon particles have an average largest dimension less than about 1 μm.3. The composite material of claim 1 , comprising about 20% to about 80% of the silicon particles by weight.4. The composite material of claim 1 , wherein the at least one of the one or more types of carbon phases that is the substantially continuous phase is electrochemically active and electrically conductive.5. The composite material of claim 1 , wherein the at least one of the one or more types of carbon phases that is the substantially continuous phase comprises hard carbon.6. The composite material of claim 1 , wherein the one or more types of carbon phases comprises graphite particles.7. The composite material of claim 1 , further comprising conductive particles.8. The composite material of claim 1 , further comprising metal particles.9. The ...

A ceramic nuclear fuel pellet, a fuel rod, and a fuel assembly

A fuel assembly for a nuclear reactor, a fuel rod of the fuel assembly, and a ceramic nuclear fuel pellet of the fuel rod are disclosed. The fuel pellet includes a first fissile material of UB, The boron of the UBis enriched to have a concentration of the isotope B that is higher than for natural B. 116-. (canceled)17. A ceramic nuclear fuel pellet for a nuclear reactor , wherein the nuclear fuel pellet comprises a first fissile material of UB , wherein the boron of the UBis enriched to have a concentration of the isotope B that is higher than for natural B.18. The ceramic nuclear fuel pellet according to claim 17 , wherein the concentration of the isotope B is at least 85% by weight.19. The ceramic nuclear fuel pellet according to claim 17 , wherein the concentration of the isotope B is at least 90% by weight.20. The ceramic nuclear fuel pellet according to claim 17 , wherein the concentration of the isotope B is at least 95% by weight.21. The ceramic nuclear fuel pellet according to claim 17 , wherein the concentration of the isotope B is at approximately 100% by weight.22. The ceramic nuclear fuel pellet according to claim 17 , wherein the nuclear fuel pellet consists of UB.23. The ceramic nuclear fuel pellet according claim 17 , wherein the nuclear fuel pellet comprises at least one second fissile material.24. The ceramic nuclear fuel pellet according to claim 23 , wherein the at least one second fissile material comprises one of an actinide nitride claim 23 , an actinide silicide and an actinide oxide.25. The ceramic nuclear fuel pellet according to claim 23 , wherein the at least one second fissile material comprises one of UN claim 23 , USi claim 23 , UO claim 23 , USi claim 23 , USi claim 23 , PuN claim 23 , PuSi claim 23 , PuO claim 23 , PuSi claim 23 , PuSi claim 23 , ThN claim 23 , ThSi claim 23 , ThO claim 23 , ThSi and ThSi.26. The ceramic nuclear fuel pellet according to claim 23 , wherein the at least one second fissile material comprises UB claim 23 ...

METHOD OF TREATING A PRECERAMIC MATERIAL

A method of treating a preceramic material includes providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O—M, where Si is silicon, O is oxygen and M is at least one metal, and thermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O—M material into a ceramic material. 1. A method of treating a preceramic material , the method comprising:providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O—M, where Si is silicon, O is oxygen and M is at least one metal; andthermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O—M material into a ceramic material.2. The method as recited in claim 1 , wherein thermally converting the preceramic polycarbosilane or polycarbosiloxane material produces a ceramic material having a composition SiOMC claim 1 , wherein x<2 claim 1 , y>0 and z<1 and x and z are non-zero.3. The method as recited in claim 1 , wherein the at least one metal is selected from the group consisting of aluminum claim 1 , boron claim 1 , alkaline earth metals claim 1 , transition metals claim 1 , refractory metals claim 1 , rare earth metals and combinations thereof.4. The method as recited in claim 1 , wherein the at least one metal is selected from the group consisting of aluminum claim 1 , boron and combinations thereof.5. The method as recited in claim 1 , wherein the at least one metal is a transition metal selected from the group consisting of titanium claim 1 , zirconium claim 1 , hafnium claim 1 , vanadium claim 1 , chromium and combinations thereof.6. The method as recited in claim 1 , wherein the at least one metal is a refractory metal selected from the group consisting of niobium claim 1 , tantalum claim 1 , molybdenum claim 1 , tungsten claim 1 , rhenium and combinations thereof.7. The method as recited in claim 1 , wherein the at least one metal is a rare earth metal selected from ...

Formulations with active functional additives for 3d printing of preceramic polymers, and methods of 3d-printing the formulations

This invention provides resin formulations which may be used for 3D printing and pyrolyzing to produce a ceramic matrix composite. The resin formulations contain a solid-phase filler, to provide high thermal stability and mechanical strength (e.g., fracture toughness) in the final ceramic material. The invention provides direct, free-form 3D printing of a preceramic polymer loaded with a solid-phase filler, followed by converting the preceramic polymer to a 3D-printed ceramic matrix composite with potentially complex 3D shapes or in the form of large parts. Other variations provide active solid-phase functional additives as solid-phase fillers, to perform or enhance at least one chemical, physical, mechanical, or electrical function within the ceramic structure as it is being formed as well as in the final structure. Solid-phase functional additives actively improve the final ceramic structure through one or more changes actively induced by the additives during pyrolysis or other thermal treatment.

SILICON PARTICLES FOR BATTERY ELECTRODES

Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight of silicon particles. The silicon particles have an average particle size between about 0.1 μm and about 30 μm and a surface including nanometer-sized features. The composite material also includes greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases is a substantially continuous phase. 1. A method of forming a composite material , the method comprising: polyimide or a polyimide precursor;', 'silicon particles; and', 'graphite particles; and, 'providing a mixture comprising the one or more carbon phases comprises hard carbon that is 10% to 25% by weight of the composite material and holds together the composite material, and', 'the silicon particles are between 50% and 90% by weight of the composite material distributed throughout the one or more carbon phases., 'pyrolysing the mixture to convert the polyimide or the polyimide precursor into one or more carbon phases to form the composite material such that2. The method of claim 1 , further comprising:casting the mixture on a substrate;drying the mixture;removing the dried mixture from the substrate; andplacing the dried mixture in a hot press.3. The method of claim 1 , further comprising forming a battery electrode from the composite material.4. The method of claim 1 , wherein providing the mixture comprises providing silicon particles having an average largest dimension of 10 nm to 40 μm.5. The method of claim 1 , wherein providing the mixture comprises providing conductive particles in the mixture.6. The method of claim 1 , wherein providing the mixture comprises providing copper claim 1 , nickel claim 1 , or stainless ...

Paste composition for additive manufacturing

An additive manufacturing paste composition for manufacturing a three-dimensional shaped article of a material of interest, said paste composition including 70-99.8 wt. % with respect to the weight of the composition of particles of the material of interest, the material of interest being one or more compounds selected from the group of metals and metal alloys and mixtures thereof, at least one binder component, at least one additive component, which is a lubricant, one or more solvents which are miscible with each other, wherein the sum of the concentration of the at least one additive component and the at least one binder is between 0.06 wt. % and 10.0 wt. %, with respect to the weight of the paste composition, and wherein at least one of the additive component and the binder component or the mixture thereof are shear-thinning.

STRUCTURE

According to one embodiment, a structure includes a polycrystalline substance of yttrium oxyfluoride as a main component. The yttrium oxyfluoride has an orthorhombic crystal structure, and an average crystallite size of the polycrystalline substance is less than 100 nanometers. When taking a peak intensity detected near diffraction angle 2θ=32.0° by X-ray diffraction as γ, and taking a peak intensity detected near diffraction angle 2θ=32.8° as δ, a peak intensity ratio γ/δ is not less than 0% and not more than 150%. 1. A structure including a polycrystalline substance of yttrium oxyfluoride as a main component , the yttrium oxyfluoride having an orthorhombic crystal structure , and an average crystallite size of the polycrystalline substance being less than 100 nanometers ,when taking a peak intensity detected near diffraction angle 2θ=32.0° by X-ray diffraction as γ, and taking a peak intensity detected near diffraction angle 2θ=32.8° as δ,a peak intensity ratio γ/δ being not less than 0% and not more than 150%.2. A structure including a polycrystalline substance of yttrium fluoride , an average crystallite size in the polycrystalline substance being less than 100 nanometers ,when taking a peak intensity detected near diffraction angle 2θ=24.3° by X-ray diffraction as α, and taking a peak intensity detected near diffraction angle 2θ=25.7° as β,a peak intensity ratio α/β being not less than 0% and less than 100%.3. The structure according to claim 1 , whereinthe peak intensity ratio γ/δ is not more than 120%.4. The structure according to claim 1 , whereinthe peak intensity ratio γ/δ is not more than 110%.5. The structure according to claim 1 , whereinthe structure further includes a polycrystalline substance of yttrium fluoride,when taking a peak intensity detected near diffraction angle 2θ=24.3° by X-ray diffraction as α, and taking a peak intensity detected near diffraction angle 2θ=25.7° as β,a peak intensity ratio α/β being not less than 0% and less than 100%.6. ...

STRUCTURE

According to one embodiment, a structure includes a polycrystalline substance of yttrium oxyfluoride as a main component. The yttrium oxyfluoride has a rhombohedral crystal structure, and an average crystallite size of the polycrystalline substance is less than 100 nanometers. When taking a peak intensity of rhombohedron detected near diffraction angle 2θ=13.8° by X-ray diffraction as r1, taking a peak intensity of rhombohedron detected near diffraction angle 2θ=36.1° as r2, and taking a proportion γ1 as γ1(%)=r2/r1×100, the proportion γ1 is not less than 0% and less than 100%. 1. A structure including a polycrystalline substance of yttrium oxyfluoride as a main component , the yttrium oxyfluoride having a rhombohedral crystal structure , and an average crystallite size of the polycrystalline substance being less than 100 nanometers ,when taking a peak intensity of rhombohedron detected near diffraction angle 2θ=13.8° by X-ray diffraction as r1, taking a peak intensity of rhombohedron detected near diffraction angle 2θ=36.1° as r2, and taking a proportion γ1 as γ1(%)=r2/r1×100,the proportion γ1 being not less than 0% and less than 100%.2. The structure according to claim 1 , whereinthe proportion γ1 is less than 80%.3. The structure according to claim 1 , whereinthe structure does not include yttrium oxyfluoride having an orthorhombic crystal structure, orfurther includes yttrium oxyfluoride having the orthorhombic crystal structure,when taking a peak intensity of orthorhombus detected near a diffraction angle 2θ=16.1° by X-ray diffraction as o, and taking a proportion of orthorhombus to rhombohedron as γ2(%)=o/r1×100, the proportion γ2 is not less than 0% and less than 100%.4. The structure according to claim 1 , whereinthe yttrium oxyfluoride having the rhombohedral crystal structure is YOF.5. The structure according to claim 3 , whereinthe yttrium oxyfluoride having the orthorhombic crystal structure is YOF of 1:1:2 (molar ratio is Y:O:F=1:1:2).6. The structure ...

Method of processing a ceramic matrix composite (cmc) component

A method of processing a CMC component includes preparing a fiber preform having a predetermined shape, and positioning the fiber preform with tooling having holes facing one or more surfaces of the fiber preform. After the positioning, a clamping pressure is applied to the tooling to force portions of the one or more surfaces of the fiber preform into the holes, thereby forming protruded regions of the fiber preform. During the application of the clamping pressure, the fiber preform is exposed to gaseous reagents at an elevated temperature, and a matrix material is deposited on the fiber preform to form a rigidized preform including surface protrusions. After removing the tooling, the rigidized preform is infiltrated with a melt for densification, and a CMC component having surface bumps is formed. When the CMC component is assembled with a metal component, the surface bumps may reduce diffusion at high temperatures.

PROCESS FOR THE PRODUCTION OF SINTER POWDER PARTICLES (SP) CONTAINING AT LEAST ONE REINFORCEMENT FIBER

A process for the production of sinter powder particles (SP), comprising the steps a) providing at least one continuous filament, b) coating, the at least one continuous filament provided in step a) with at least one thermoplastic polymer to obtain a continuous strand comprising the at least one continuous filament, coated with the at least one thermoplastic polymer, wherein the average cross-sectional diameter of the strand is in the range of 10 to 300 pm, and c) size reducing of the continuous strand provided in step b) in order to obtain the sinter powder particles (SP), wherein the average length of the sinter powder particles (SP) is in the range of 10 to 300 pm. The present invention further relates to sinter powder particles (SP) obtained by the process, the use of the sinter powder particles (SP) in a powder-based additive manufacturing process and sinter powder particles (SP) having an essentially cylindrical shape N as well as a process for the production of a shaped body by laser sintering or high-speed sintering of sinter powder particles (SP). 1. A process for the production of sinter powder particles (SP) , comprising the stepsa) providing at least one continuous filament,b) coating, the at least one continuous filament provided in step a) with at least one thermoplastic polymer to obtain a continuous strand comprising the at least one continuous filament, coated with the at least one thermoplastic polymer, wherein the average cross-sectional diameter of the strand is in the range of 10 to 300 μm, andc) size reducing of the continuous strand provided in step b) in order to obtain the sinter powder particles (SP), wherein the average length of the sinter powder particles (SP) is in the range of 10 to 300 μm.2. A process according to claim 1 , wherein the cross-sectional diameter of the continuous filament is in the range of 3 to 30 μm.3. A process according to or claim 1 , wherein the continuous filament is selected from the group consisting of ...

SILICON PARTICLES FOR BATTERY ELECTRODES

Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight of silicon particles. The silicon particles have an average particle size between about 0.1 μm and about 30 μm and a surface including nanometer-sized features. The composite material also includes greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases is a substantially continuous phase. 116.-. (canceled)17. A method of forming a composite material film , the method comprising:providing a mixture comprising polyimide or a polyimide precursor, the mixture further comprising silicon particles and graphite particles; andpyrolysing the mixture to convert the polyimide or the polyimide precursor into one or more carbon phases to form the composite material film such that the one or more carbon phases comprises hard carbon that is 10% to 25% by weight of the composite material film and holds together the pyrolysed film, and the silicon particles are between 50% and 90% by weight of the composite material film distributed throughout the one or more carbon phases, wherein after pyrolysing the mixture, the mixture forms a self-supported composite structure.18. The method of claim 17 , further comprising:casting the mixture on a substrate;drying the mixture;removing the dried mixture from the substrate; andplacing the dried mixture in a hot press.19. The method of claim 18 , wherein placing the dried mixture in a hot press comprises placing the dried mixture in a hot press under negligible pressure.20. The method of claim 17 , further comprising forming a battery electrode from the composite material film.21. The method of claim 17 , wherein providing the mixture comprises providing ...

Method for production and identification of weyl semimetal

Disclosed is a method for producing and identifying a Weyl semimetal. Identification is enabled via a combination of the vacuum ultraviolet (low-photon energy) and soft X-ray (SX) angle resolved photoemission spectroscopy (ARPES). Production generally requires providing high purity raw materials, creating a mixture, heating the mixture in a container at a temperature sufficient for thermal decomposition of an impurity while preventing the possible reaction between the side walls of the container and the raw materials, depositing the resulting compound and a transfer agent onto the bottom surface of the ampule, differentially heating the ampule, and allowing a chemical vapor transport reaction to complete.

High Strength Alpha/Near-alpha Ti Alloys

Ta containing alpha/near alpha Ti alloys are disclosed. The alloys include Ta. The alloys retain higher percentage amounts of room temperature dynamic modulus at elevated temperatures. 1. An alpha/near-alpha Ti alloy comprising , in percent by weight based on total alloy weight: about 7 to about 9 Al; about 0.5 to about 11 Ta; about 0 to about 2 Cr , about 0 to about 5 Mo and up to 3 wt % of other alloying elements where the other alloying elements include one or more of Co , Cu , Fe , Mn , Ni , Si , Sn , V , W and Y and wherein the alloy is substantially free of Nb , Zr and Hf.2. The alpha/near-alpha Ti alloy of claim 1 , wherein the alloy comprises an Al equivalent value of at about 6.5 or more and exhibits a dynamic modulus at 800° F. of about 15.5 MSI or more.3. The alpha/near alpha Ti alloy of claim 1 , wherein the alloy comprises an Al equivalent value of about 8 to about 9.5 claim 1 , and exhibits a dynamic modulus of about 15.5 MSI or more at 800° F.4. An article of manufacture comprising the alloy of .5. The article of manufacture of claim 4 , wherein the article of manufacture is any of an aircraft engine component claim 4 , an aircraft structural component claim 4 , an automotive component claim 4 , a medical device component claim 4 , a sports equipment component claim 4 , a marine applications component claim 4 , and a chemical processing equipment component.6. An alpha/near-alpha Ti alloy comprising claim 4 , in percent by weight based on total alloy weight: about 7.8 Al; about 3.5 Ta; about 0.5 Cr; remainder Ti and wherein the alloy is substantially free of Nb claim 4 , Zr claim 4 , and Hf.7. An alpha/near-alpha Ti alloy comprising claim 4 , in percent by weight based on total alloy weight: about 7.8 Al; about 3.5 Ta; about 1.0 Mo; remainder Ti and wherein the alloy is substantially free of Nb claim 4 , Zr claim 4 , and Hf.8. A composite comprising the alloy of and a ceramic reinforcement.9. The alpha/near-alpha Ti alloy of wherein the alloy is the ...

Monomer formulations and methods for 3d printing of preceramic polymers

This invention provides resin formulations which may be used for 3D printing and pyrolyzing to produce a ceramic matrix composite. The resin formulations contain a solid-phase filler, to provide high thermal stability and mechanical strength (e.g., fracture toughness) in the final ceramic material. The invention provides direct, free-form 3D printing of a preceramic polymer loaded with a solid-phase filler, followed by converting the preceramic polymer to a 3D-printed ceramic matrix composite with potentially complex 3D shapes or in the form of large parts. Other variations provide active solid-phase functional additives as solid-phase fillers, to perform or enhance at least one chemical, physical, mechanical, or electrical function within the ceramic structure as it is being formed as well as in the final structure. Solid-phase functional additives actively improve the final ceramic structure through one or more changes actively induced by the additives during pyrolysis or other thermal treatment.

THERMAL SPRAY MATERIAL AND THERMAL SPRAY COATED ARTICLE

Provided is a thermal spray material that can form a compact thermal sprayed coating having an enhanced plasma erosion resistance. The herein disclosed art provides a thermal spray material that contains a rare earth element (RE), oxygen (O), and a halogen element (X) as constituent elements and that contains a mixed crystal of a rare earth element oxyhalide (RE-O—X) and a rare earth element halide (REX). 1. A thermal spray coated article , comprising a substrate and a thermal sprayed coating provided on the surface of the substrate , whereinthe thermal sprayed coating has a porosity of not more than 7% and comprises as a main component thereof a rare earth element oxyhalide containing a rare earth element, oxygen, and a halogen element (X) as constituent elements.2. The thermal spray coated article according to claim 1 , substantially being free from a rare earth element halide that is a halide of the rare earth element.3. The thermal spray coated article according to claim 1 , substantially being free from a rare earth element oxide that is an oxide of the rare earth element.4. The thermal spray coated article according to claim 1 , comprising yttrium as the rare earth element claim 1 , comprising fluorine as the halogen element claim 1 , comprising yttrium oxyfluoride as the rare earth element oxyhalide claim 1 , and comprising yttrium fluoride as the rare earth element halide.5. A thermal spray coated article comprising:a substrate; anda thermal sprayed coating provided on the surface of the substrate and being a thermal spray deposit of a thermal spraying material, the thermal spray material comprising a rare earth element, oxygen, and a halogen element as constituent elements, and comprising a mixed crystal of a rare earth element oxyhalide and a rare earth element halide.6. The thermal spray coated article according to claim 5 , substantially being free from a rare earth element halide that is a halide of the rare earth element.7. The thermal spray coated ...

Metal nitrides and/or metal carbides with nanocrystalline grain structure

Disclosed is a composition having nanoparticles or particles of a refractory metal, a refractory metal hydride, a refractory metal carbide, a refractory metal nitride, or a refractory metal boride, an organic compound consisting of carbon and hydrogen, and a nitrogenous compound consisting of carbon, nitrogen, and hydrogen. The composition, optionally containing the nitrogenous compound, is milled, cured to form a thermoset, compacted into a geometric shape, and heated in a nitrogen atmosphere at a temperature that forms a nanoparticle composition comprising nanoparticles of metal nitride and optionally metal carbide. The nanoparticles have a uniform distribution of the nitride or carbide.

Ceramic matrix composite component including cooling channels in multiple plies and method of producing

A ceramic matrix composite (CMC) component and method of fabrication including one or more elongate functional features formed in multiple fiber plies of the CMC component. The CMC component includes a plurality of longitudinally extending ceramic matrix composite plies in a stacked configuration. Each of the one or more elongate functional features includes an inlet and an outlet to provide a flow of fluid from a fluid source to an exterior of the ceramic matrix composite component. The one or more elongate functional features are configured in multiple plies of the plurality of longitudinally extending ceramic matrix composite plies to form a plurality of cooling channels in multiple plies of the ceramic matrix composite component.

ENVIRONMENTALLY RESISTANT PATCHES AND DELIVERY SYSTEMS

An environmentally resistant patch includes one or more rare earth silicates, wherein an inorganic composition of the environmentally resistant patch includes, once cured, from about 80 mole percent to about 100 mole percent of a rare earth monosilicate and/or rare earth disilicate composition and from about 0 mole percent to about 20 mole percent of an inorganic additive, and, wherein the environmentally resistant patch has, once cured, an adhesive strength of at least about 3 MPa and a coefficient of thermal expansion of from about 3.5×10/° C. to about 7.5×10/° C. 1. An environmentally resistant patch comprising:one or more rare earth silicates;wherein an inorganic composition of the environmentally resistant patch comprises, once cured, from about 80 mole percent to about 100 mole percent of a rare earth monosilicate and/or rare earth disilicate and from about 0 mole percent to about 20 mole percent of an inorganic additive; and,{'sup': −6', '−6, 'wherein the environmentally resistant patch has, once cured, an adhesive strength of at least about 3 MPa and a coefficient of thermal expansion of from about 3.5×10/° C. to about 7.5×10/° C.'}2. The environmentally resistant patch of claim 1 , wherein the one or more rare earth silicates comprise at least one of a rare earth monosilicate and a rare earth disilicate claim 1 , and wherein the rare earth comprises at least one of ytterbium and yttrium.3. The environmentally resistant patch of claim 1 , wherein the inorganic additive comprises at least one of iron oxide claim 1 , aluminum oxide claim 1 , silicon oxide and glass.4. The environmentally resistant patch of claim 1 , wherein the inorganic additive comprises elemental silicon.5. The environmentally resistant patch of claim 1 , wherein the environmentally resistant patch claim 1 , uncured claim 1 , comprises from about 30 percent by volume to about 80 percent by volume of the inorganic composition claim 1 , and from about 70 percent by volume to about 20 percent ...

NUCLEAR FUEL SINTERED PELLET HAVING EXCELLENT IMPACT RESISTANCE

Proposed is a nuclear fuel pellet manufactured with UOpowder and being in a cylindrical shape, the nuclear fuel pellet including: a dish () provided in a shape of a spherical groove having a predetermined curvature and a diameter of 4.8 to 5.2 mm at a center of each of top and bottom surfaces of the nuclear fuel pellet; a shoulder () provided in an annular plane along a rim of the dish (); a first chamfer () provided along a rim of the shoulder () while being adjacent to the shoulder (); and a second chamfer () provided along a rim of the first chamfer (), wherein a width (SW) of the shoulder () is 0.4565 mm to 0.6565 mm, an angle between the first chamfer () and a horizontal plane is 2.0°, and an angle between the second chamfer () and the horizontal plane is 18.0°. 1. A nuclear fuel pellet manufactured with UOpowder and having a cylindrical shape having a height of 9 mm to 13 mm and a horizontal sectional diameter of 8 mm to 8.5 mm , the nuclear fuel pellet comprising:{'b': '10', 'a dish () provided in a shape of a spherical groove having a predetermined curvature and a diameter of 4.8 to 5.2 mm at a center of each of a top surface and a bottom surface of the nuclear fuel pellet;'}{'b': 20', '10, 'a shoulder () provided in an annular plane along a rim of the dish ();'}{'b': 310', '20', '20, 'a first chamfer () provided along a rim of the shoulder () while being adjacent to the shoulder (); and'}{'b': 320', '310, 'a second chamfer () provided along a rim of the first chamfer (),'}{'b': '20', 'wherein a width (SW) of the shoulder () is 0.4565 mm to 0.6565 mm,'}{'b': '310', 'an angle between the first chamfer () and a horizontal plane is 2.0°, and'}{'b': '320', 'an angle between the second chamfer () and the horizontal plane is 18.0°.'}2. The nuclear fuel pellet of claim 1 , wherein the nuclear fuel pellet is manufactured using a powder in which at least one of PuOpowder claim 1 , GdOpowder claim 1 , and ThOpowder is mixed with UOpowder.3. The nuclear pellet of claim ...

CERAMIC PARTICLE AND METHOD FOR PRODUCING THE SAME

A ceramic particle includes a core and a modification layer. The core is made of magnesium or a magnesium alloy. The core has a diameter of 30-100 μm. The modification layer covers an outer surface of the core. The modification layer includes calcium and phosphorus. A method for producing a ceramic particle includes providing a core made of magnesium or a magnesium alloy and having a diameter of 30-100 μm. A calcium salt and a phosphorus salt are dissolved in a solvent. A chelating agent is added into the solvent to form a modifying solution. The core is added into the modifying solution to form a modification layer on an outer surface of the core in a temperature range of 5-40° C. The modification layer includes calcium and phosphorus. 1. A ceramic particle comprising:a core made of magnesium or a magnesium alloy, wherein the core has a diameter of 30-100 μm; anda modification layer covering an outer surface of the core, wherein the modification layer includes calcium and phosphorus.2. The ceramic particle as claimed in claim 1 , wherein the modification layer has a thickness of 0.1-5 μm.3. The ceramic particle as claimed in claim 1 , wherein a mole ratio of calcium to phosphorus in the modification layer is in a range of 1.0-1.8.4. The ceramic particle as claimed in claim 3 , wherein the modification layer is formed of calcium monohydrogen phosphate claim 3 , hydroxyapatite claim 3 , or tricalcium diphosphate.5. A method for producing a ceramic particle claim 3 , comprising:providing a core made of magnesium or a magnesium alloy, wherein the core has a diameter of 30-100 μm;dissolving a calcium salt and a phosphorus salt in a solvent, and adding a chelating agent into the solvent to form a modifying solution; andadding the core into the modifying solution to form a modification layer on an outer surface of the core in a temperature range of 5-40° C., wherein the modification layer includes calcium and phosphorus.6. The method for producing the ceramic particle as ...

ENHANCED CERAMIC COATING

The present invention relates to an enhanced ceramic coating, ECC, composition comprising a non-stick ceramic coating composition, CCC, and 0.2 wt %-2 wt % diamond additive, DA with wt % compared with the total weight compared to the ECC composition. It also relates to a method of coating an artefact with the ECC, and an artefact provided 5 with a dry film coating containing an ECC prepared using an ECC composition of the invention. An artefact coated with the ECC has the combined advantages of durable non-stick, scratch resistance and abrasion resistance. 119-. (canceled)20. An enhanced ceramic coating , ECC , composition for providing an enhanced non-stick ceramic coating on an artefact , the ECC composition comprising:a sol-gel type ceramic coating composition comprising a silane or an oligomer thereof and silica, and0.2 wt %-2 wt % of a diamond additive, with wt % compared with the total weight of the enhanced ceramic coating ECC composition,characterised in that the ECC has a non-stick durability of a least 17 cycles, wherein the non-stick durability of a coating is measured by determining the number of cycles required to reduce the non-stick grade of the coating from 5 to 1, wherein the non-stick grade is determined by performing a Fried Egg Test according to the Cookware Manufacturers Association Standard before and after each cycle and wherein each cycle comprises in sequence an ENV12875-1:1998 standard Dishwasher test, a first temperature treatment (260° C. for 10 min), quenching, and a second temperature treatment (260° C. for 10 min).21. The ECC composition according to claim 20 , wherein the sol-gel type ceramic coating composition further comprises a ceramic powder that emits far infrared radiation and anions.22. The ECC composition according to claim 20 , wherein the sol-gel type ceramic coating composition is present at more than 90 wt % claim 20 , with wt % compared with the total weight of the ECC composition.23. The ECC composition according to ...

HONEYCOMB STRUCTURE

A honeycomb structure includes a tubular circumferential wall and partition walls forming a honeycomb-shaped cross-section and defining a plurality of cells extending inside the circumferential wall in an axial direction of the circumferential wall. The partition walls are constructed by a frame portion, formed by a plurality of ceramic particles arranged in a shape corresponding to the partition walls, and a filling portion, formed by metal silicon filling a gap between ceramic particles in the frame portion. The frame portion is maintained in a shape corresponding to the partition walls by the filling portion. 1. A honeycomb structure comprisinga tubular circumferential wall, andpartition walls forming a honeycomb-shaped cross-section and defining a plurality of cells extending inside the circumferential wall in an axial direction of the circumferential wall, whereinthe partition walls are constructed by a frame portion, formed by a plurality of ceramic particles arranged in a shape corresponding to the partition walls, and a filling portion, formed by metal silicon filling a gap between ceramic particles in the frame portion, andthe frame portion is maintained in a shape corresponding to the partition walls by the filling portion.2. The honeycomb structure according to claim 1 , wherein the ceramic particles are non-sintered.3. The honeycomb structure according to claim 1 , wherein a volume ratio of the ceramic particles to the metal silicon is from 60:40 to 40:60.4. The honeycomb structure according to claim 1 , wherein the ceramic particles are silicon carbide particles. The present invention relates to a honeycomb structure that includes partition walls forming a honeycomb-shaped cross-section inside a circumferential wall.Patent document 1 discloses a high-temperature heat exchanger that includes an element formed by a sintered porous silicon carbide body and transfers heat between a fluid flowing inside the element and a fluid existing outside the element. ...

PROCESS FOR RAPID PROCESSING OF SiC AND GRAPHITIC MATRIX TRISO-BEARING PEBBLE FUELS

A method for producing microencapsulated fuel pebble fuel more rapidly and with a matrix that engenders added safety attributes. The method includes coating fuel particles with ceramic powder; placing the coated fuel particles in a first die; applying a first current and a first pressure to the first die so as to form a fuel pebble by direct current sintering. The method may further include removing the fuel pebble from the first die and placing the fuel pebble within a bed of non-fueled matrix ceramic in a second die; and applying a second current and a second pressure to the second die so as to form a composite fuel pebble. 112-. (canceled).13. A nuclear fuel pebble comprising:an inner fuel pebble including fuel particles microencapsulated within a fully ceramic matrix; anda non-fueled matrix ceramic surrounding the inner fuel pebble.14. The nuclear fuel pebble according to claim 13 , wherein the fuel particles are tristructural-isotropic fuel particles (TRISO).15. The nuclear fuel pebble according to claim 13 , wherein the fully ceramic matrix comprises graphite or silicon carbide.16. The nuclear fuel pebble according to claim 13 , wherein the non-fueled matrix ceramic comprises graphite.17. The nuclear fuel pebble according to claim 16 , wherein the non-fueled matrix ceramic further comprises phenolic or other resin binder.18. The nuclear fuel pebble according to claim 13 , wherein the non-fueled matrix ceramic comprises silicon carbide.19. The nuclear fuel pebble according to claim 18 , wherein the non-fueled matrix ceramic further comprises a rare-earth oxide neutronic poison selected from the group consisting of GdO claim 18 , ErO claim 18 , DyO claim 18 , and EuO claim 18 , and combinations thereof.20. The nuclear fuel pebble according to claim 18 , wherein the non-fueled matrix ceramic further comprises sintering additives selected from the group consisting of AlOand YOand combinations thereof.21. The nuclear fuel pebble according to claim 13 , wherein the ...

Polysilocarb Materials and Methods

Silicon (Si) based materials and methods of making those materials. More specifically, methods and materials having silicon, oxygen and carbon that form filled and unfilled plastic materials and filled and unfilled ceramics. 1. A solvent free method for making a ceramic material , the method comprising:a. mixing a first liquid polysilocarb precursor with a second liquid precursor in the absence of a solvent to form a solvent free liquid polysilocarb precursor formulation, whereby the first liquid polysilocarb precursor is not chemically reacted with the second liquid precursor;b. curing the polysilocarb precursor formulation to form a sold material, whereby the first liquid polysilocarb precursor and the second liquid precursor chemically react to form the solid material; and,c. pyrolzing the sold material to form a ceramic material.2. The method of claim 1 , wherein the first liquid precursor is methyl hydrogen fluid.3. The method of claim 1 , wherein the first liquid precursor is a methyl terminated hydride substituted polysiloxane.4. The method of claim 1 , wherein the first liquid precursor is selected from the group consisting of a methyl terminated vinyl polysiloxane claim 1 , a vinyl terminated vinyl polysiloxane claim 1 , a hydride terminated vinyl polysiloxane claim 1 , and an allyl terminated dimethyl polysiloxane.5. The method of claim 1 , wherein the first liquid precursor is selected from the group consisting of a vinyl terminated dimethyl polysiloxane claim 1 , a hydroxy terminated dimethyl polysiloxane claim 1 , a hydride terminated dimethyl polysiloxane claim 1 , and a hydroxy terminated vinyl polysiloxane.6. The method of claim 1 , wherein the first liquid precursor is selected from the group consisting of a phenyl terminated dimethyl polysiloxane claim 1 , a phenyl and methyl terminated dimethyl polysiloxane claim 1 , a methyl terminated dimethyl diphenyl polysiloxane claim 1 , a vinyl terminated dimethyl diphenyl polysiloxane claim 1 , a hydroxy ...

Method of making a fiber preform for ceramic matrix composite (cmc) fabrication utilizing a fugitive binder

A method of making a fiber preform for ceramic matrix composite (CMC) fabrication comprises laminating an arrangement of fibers between polymer sheets comprising an organic polymer, which may function as a fugitive binder during fabrication, to form a flexible prepreg sheet. A plurality of the flexible prepreg sheets are laid up in a predetermined geometry to form a stack, and the stack is heated to soften the organic polymer and bond together the flexible prepreg sheets into a bonded prepreg structure. Upon cooling of the bonded prepreg structure, a rigid preform is formed. The rigid preform is heated at a sufficient temperature to pyrolyze the organic polymer. Thus, a porous preform that may undergo further processing into a CMC is formed.

Process for Producing a Silicon Carbide-Containing Body

The present invention relates to a process for producing a silicon carbide-containing body ( 100 ), characterized in that the process has the following process steps: a) providing a mixture ( 16 ) comprising a silicon source and a carbon source, the silicon source and the carbon source being present together in particles of a solid granular material; b) arranging a layer of the mixture ( 16 ) provided in process step a) on a carrier ( 12 ), the layer of the mixture ( 16 ) having a predefined thickness; and c) treating the mixture ( 16 ) arranged in process step b) over a locally limited area with a temperature within a range from ≥1400° C. to ≤2000° C. according to a predetermined three-dimensional pattern, the predetermined three-dimensional pattern being selected on the basis of the three-dimensional configuration of the body ( 100 ) to be produced. Such a process allows simple and inexpensive production even of complex structures from silicon carbide.

Porous stabilized beds, methods of manufacture thereof and articles comprising the same

Disclosed herein is a method comprising disposing a first particle in a reactor; the first particle being a magnetic particle or a particle that can be influenced by a magnetic field, an electric field or a combination of an electrical field and a magnetic field; fluidizing the first particle in the reactor; applying a uniform magnetic field, a uniform electrical field or a combination of a uniform magnetic field and a uniform electrical field to the reactor; elevating the temperature of the reactor; and fusing the first particles to form a monolithic solid.

METHODS OF PROVIDING HIGH PURITY SiOC AND SiC MATERIALS

Organosilicon chemistry, polymer derived ceramic materials, and methods. Such materials and methods for making polysilocarb (SiOC) and Silicon Carbide (SiC) materials having 3-nines, 4-nines, 6-nines and greater purity. Processes and articles utilizing such high purity SiOC and SiC.

METHOD TO PROCESS A CERAMIC MATRIX COMPOSITE (CMC) WITH A PROTECTIVE CERAMIC COATING

A method of producing a ceramic matrix composite including a protective ceramic coating thereon comprises applying a surface slurry onto an outer surface of an impregnated fiber preform. The surface slurry includes particulate ceramic solids dispersed in a flowable preceramic polymer comprising silicon, and the impregnated fiber preform comprises a framework of ceramic fibers loaded with particulate matter. The flowable preceramic polymer is cured, thereby forming on the outer surface a composite layer comprising a cured preceramic polymer with the particulate ceramic solids dispersed therein. The cured preceramic polymer is then pyrolyzed to form a porous ceramic layer comprising silicon carbide, and the impregnated fiber preform and the porous ceramic layer are infiltrated with a molten material comprising silicon. After infiltration, the molten material is cooled to form a ceramic matrix composite body with a protective ceramic coating thereon. 1. A method of producing a ceramic matrix composite having a protective ceramic coating , the method comprising:applying a first surface slurry onto an outer surface of an impregnated fiber preform comprising a framework of ceramic fibers loaded with particulate matter, the first surface slurry comprising particulate ceramic solids dispersed in a solvent;drying the first surface slurry to form a dried porous layer comprising the particulate ceramic solids;infiltrating a flowable preceramic polymer comprising silicon into the dried porous layer;curing the flowable preceramic polymer to form a composite layer on the outer surface, the composite layer comprising a cured preceramic polymer with the particulate ceramic solids dispersed therein;pyrolyzing the cured preceramic polymer to form a porous ceramic layer comprising silicon carbide on the outer surface;infiltrating the impregnated fiber preform and the porous ceramic layer on the outer surface thereof with a molten material comprising silicon; andafter infiltration with ...

COLD SINTERING CERAMICS AND COMPOSITES

Cold sintering of materials includes using a process of combining at least one inorganic compound, e.g., ceramic, in particle form with a solvent that can partially solubilize the inorganic compound to form a mixture; and applying pressure and a low temperature to the mixture to evaporate the solvent and densify the at least one inorganic compound to form sintered materials. 120-. (canceled)21. A material , comprising:at least one inorganic compound; combining the at least one inorganic compound with a solvent to form a mixture; and', 'applying pressure and heat to the mixture to evaporate the solvent and densify the at least one inorganic compound to form the material, wherein the applied heat is at a temperature of no more than 200° C. above the boiling point of the solvent, and wherein the material is densified to a relative density of greater than 80%., 'the material being a sintered material formed via a sintering process comprising22. The material of claim 21 , wherein the at least one inorganic compound has a particle size of less than 50 μm or less than 30 μm when combined with the solvent to form the mixture.231. The material of claim claim 21 , wherein the combining of the at least one inorganic compound with the solvent to form the mixture includes combining the at least one inorganic compound with at least one other substance with the solvent to form the mixture.24. The material of claim 23 , wherein the other substance is a polymer.25. The material of claim 21 , wherein the solvent at least partially solubilizes the at least one inorganic compound.26. The material of any of claim 21 , wherein the material is a composite material.27. The material of claim 21 , wherein a time period of less than 180 minutes claim 21 , a time period of no more than 60 minutes or a time period of no more than 30 minutes is utilized to obtain the relative density of greater than 80%.28. The material of claim 21 , wherein the solvent includes one or more of a Calcohol claim ...

SILICON-BASED MATERIALS CONTAINING INDIUM AND METHODS OF FORMING THE SAME

A ceramic component is generally provided that includes a silicon-based layer comprising a silicon-containing material (e.g., a silicon metal and/or a silicide) and about 0.001% to about 85% of an In-containing compound. For example, the silicon-based layer can be a bond coating directly on the surface of the substrate. Alternatively or additionally, the silicon-based layer can be an outer layer defining a surface of the substrate, with an environmental barrier coating on the surface of the substrate. Gas turbine engines are also generally provided that include such a ceramic component. 1. The ceramic component , wherein the In-containing compound comprises ZrO2 , HfO2 , or a combination thereof doped with about 0.1% to about 10% by mole percent of In2O3.2. The ceramic component as in claim 1 , wherein the In-containing compound comprises a compound having a formula:{'br': None, 'sub': 2-x-y', 'x', 'y', '2', '7, 'LnGaInSiO'}whereLn is Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof;x is 0 to about 1; andy is greater than 0 to about 1.3. The ceramic component as in claim 1 , wherein the In-containing compound comprises a compound having a formula:{'br': None, 'sub': 2-x-y', 'x', 'y', '2', '5, 'LnGaInSiO'}whereLn is Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof;x is 0 to about 1; andy is greater than 0 to about 1.4. The ceramic component as in claim 1 , wherein the In-containing compound comprises a compound having a formula:{'br': None, 'sub': 3', '5-x', 'x', '12, 'LnInMO'}whereLn is Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof; andM is Ga with 0≤x<5, Al with 0≤x<5, Fe with 0≤x<5, B with 0≤x≤2.5, or a combination thereof.5. The ceramic component as in claim 4 , where x is 0.1 to about 2.6. The ceramic component as in claim 4 , where M is B; and x is 0.1 to about 2.7. The ceramic component as in claim 1 , wherein the In-containing compound ...

RESIN FORMULATIONS FOR POLYMER-DERIVED CERAMIC MATERIALS

This disclosure enables direct 3D printing of preceramic polymers, which can be converted to fully dense ceramics. Some variations provide a preceramic resin formulation comprising a molecule with two or more C═X double bonds or C≡X triple bonds, wherein X is selected from C, S, N, or O, and wherein the molecule further comprises at least one non-carbon atom selected from Si, B, Al, Ti, Zn, P, Ge, S, N, or O; a photoinitiator; a free-radical inhibitor; and a 3D-printing resolution agent. The disclosed preceramic resin formulations can be 3D-printed using stereolithography into objects with complex shape. The polymeric objects may be directly converted to fully dense ceramics with properties that approach the theoretical maximum strength of the base materials. Low-cost structures are obtained that are lightweight, strong, and stiff, but stable in the presence of a high-temperature oxidizing environment. 1. A preceramic resin formulation comprising:(a) a first molecule comprising two or more C═X double bonds, two or more C≡X triple bonds, or at least one C═X double bond and at least one C≡X triple bond, wherein X is selected from the group consisting of C, S, N, O, and combinations thereof, and wherein said first molecule further comprises at least one non-carbon atom selected from the group consisting of Si, B, Al, Ti, Zn, P, Ge, S, N, O, and combinations thereof;(b) optionally a second molecule comprising R—Y—H, wherein R is an organic group or an inorganic group, and wherein Y is selected from the group consisting of S, N, O, and combinations thereof;(c) a photoinitiator;(d) a free-radical inhibitor; and(e) a 3D-printing resolution agent.2. The preceramic resin formulation of claim 1 , wherein said first molecule is present from about 3 wt % to about 97 wt % of said formulation.3. The preceramic resin formulation of claim 1 , wherein at least one of said double bonds or said triple bonds is located at a terminal position of said first molecule.4. The preceramic ...

POROUS STABILIZED BEDS, METHODS OF MANUFACTURE THEREOF AND ARTICLES COMPRISING THE SAME

Disclosed herein is a method comprising disposing a first particle in a reactor; the first particle being a magnetic particle or a particle that can be influenced by a magnetic field, an electric field or a combination of an electrical field and a magnetic field; fluidizing the first particle in the reactor; applying a uniform magnetic field, a uniform electrical field or a combination of a uniform magnetic field and a uniform electrical field to the reactor; elevating the temperature of the reactor; and fusing the first particles to form a monolithic solid. 1. An article comprising:a monolithic solid comprising:a plurality of metal particles fused together in the form of aligned chains; the monolithic solid being porous.2. The article of claim 1 , wherein the article is used in a fluidized bed reactor as a solid monolith.3. The article of claim 2 , wherein the article is used to facilitate chemical reactions.4. The article of claim 1 , wherein the article is used to facilitate chemical reactions that generate hydrogen.5. The article of claim 1 , wherein the plurality of metal particles are magnetic particles.6. The article of claim 5 , wherein the metal particles comprise iron claim 5 , cobalt claim 5 , nickel or a combination comprising at least one of iron claim 5 , cobalt or nickel.7. The article of claim 1 , wherein the monolithic solid further comprises additional particles that comprise a metal claim 1 , an inorganic oxide claim 1 , an inorganic carbide claim 1 , an inorganic oxycarbide claim 1 , an inorganic nitride claim 1 , an inorganic oxynitride claim 1 , a polymer or a combination thereof. This application is a Divisional Application of Ser. No. 14/131,357 filed Jun. 13, 2014 which claims the benefit of PCT Application No. PCT/US2012/045698 filed on Jul. 6, 2012 which claims priority to U.S. Application No. 61/505,890, filed on Jul. 8, 2011, which are incorporated herein by reference in their entirety.This invention was made with Government support ...

POROUS STABILIZED BEDS, METHODS OF MANUFACTURE THEREOF AND ARTICLES COMPRISING THE SAME

Disclosed herein is a method comprising disposing a first particle in a reactor; the first particle being a magnetic particle or a particle that can be influenced by a magnetic field, an electric field or a combination of an electrical field and a magnetic field; fluidizing the first particle in the reactor; applying a uniform magnetic field, a uniform electrical field or a combination of a uniform magnetic field and uniform electrical field to the reactor; elevating the temperature of the reactor; and fusing the first particles to form a monolithic solid. 1. A monolithic solid comprising:a mixture of a plurality of first metal particles and second particles, wherein first metal particles are magnetic particles and the second particles are not magnetic particles;wherein the first particles have an average particle size of about 40 micrometers to about 100 micrometers, and the first particles are from about 10 wt % to about 90 wt % of the mixture;wherein the second particles have an average particle size of about 20 micrometers to about 100 micrometers, and the second particles are from about 10 wt % to about 90 wt % of the mixture;2. The monolithic solid of claim 1 , wherein the first metal particles comprise iron claim 1 , cobalt claim 1 , nickel or a combination comprising at least one of iron claim 1 , cobalt or nickel.3. The monolithic solid of claim 1 , wherein the first metal particles comprise an alloy magnet.4. The monolithic solid of claim 3 , wherein the alloy magnet comprises an alloy of aluminum claim 3 , iron claim 3 , cobalt and nickel) claim 3 , samarium cobalt (SmCo) claim 3 , neodymium iron boron (NdPeB) claim 3 , FeOFeO claim 3 , NiOFeO claim 3 , CuOFeO claim 3 , MgOFeO claim 3 , MnBi claim 3 , MnSb claim 3 , or MnOFeO.5. The monolithic solid of claim 1 , wherein the first metal particles are in the form of aligned chains.6. The monolithic solid of claim 1 , wherein the first metal particles are in the form of a rod claim 1 , a tube claim 1 , a ...

Method for producing a double-walled thermostructural monolithic composte part, and part produced

A fibrous preform ( 1 ) is produced, provided with a sandwich structure comprising an intermediate flexible core ( 4 ) and two outer fibrous frames ( 2, 3 ), respectively arranged on opposing outer faces of said flexible core ( 4 ) and assembled by sections of wire ( 8, 9 ) passing through said fibrous frames ( 2, 3 ), said preform ( 1 ) being impregnated with resin. Said preform is then hardened and the core ( 4 ) is removed, preferably by pre-densification with chemical vapour infiltration, and the structure produced is then densified with liquid-phase infiltration.

HIGH STRENGTH CERAMIC FIBERS AND METHODS OF FABRICATION

A method and apparatus for forming a plurality of fibers from (e.g., CVD) precursors, including a reactor adapted to grow a plurality of individual fibers; and a plurality of independently controllable lasers, each laser of the plurality of lasers growing a respective fiber. A high performance fiber (HPF) structure, including a plurality of fibers arranged in the structure; a matrix disposed between the fibers; wherein a multilayer coating is provided along the surfaces of at least some of the fibers with an inner layer region having a sheet-like strength; and an outer layer region, having a particle-like strength, such that any cracks propagating toward the outer layer from the matrix propagate along the outer layer and back into the matrix, thereby preventing the cracks from approaching the fibers. A method of forming an interphase in a ceramic matrix composite material having a plurality of SiC fibers, which maximizes toughness by minimizing fiber to fiber bridging, including arranging a plurality of SiC fibers into a preform; selectively removing (e.g., etching) silicon out of the surface of the fibers resulting in a porous carbon layer on the fibers; and replacing the porous carbon layer with an interphase layer (e.g., Boron Nitride), which coats the fibers to thereby minimize fiber to fiber bridging in the preform. 1. A high performance fiber (HPF) structure , comprising:a plurality of fibers arranged in the structure;a matrix disposed between the fibers; an inner layer region having a sheet-like strength;', 'an outer layer region, having a particle-like strength, such that any cracks propagating toward the outer layer from the matrix propagate along the outer layer and back into the matrix, thereby preventing the cracks from approaching the fibers., 'wherein a multilayer coating is provided along the surfaces of at least some of the fibers, the multilayer coating including2. The structure of claim 1 , wherein the inner layer region comprises graphitic carbon ...

IMPREGNATED FIBERS COMPRISING PRECERAMIC RESIN FORMULATIONS, AND RELATED COMPOSITE MATERIALS AND METHODS

A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 μm and second particles having an average mean diameter of from about 1.5 μm to about 5 μm. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed. 1. Impregnated fibers comprising fibers and a preceramic resin formulation comprising a polycarbosilane preceramic polymer , an organically modified silicon dioxide preceramic polymer , and at least one filler , the at least one filler comprising first particles having an average mean diameter of less than about 1.0 μm and second particles having an average mean diameter of from about 1.5 μm to about 5 μm.2. The impregnated fibers of claim 1 , wherein the fibers comprise polyacrylonitrile-based fibers.3. The impregnated fibers of claim 1 , wherein the fibers comprise pitch-based fibers.4. A composite material comprising fibers and a reaction product of a polycarbosilane preceramic polymer claim 1 , an organically modified silicon dioxide preceramic polymer claim 1 , and at least one filler claim 1 , the at least one filler comprising first particles having an average mean diameter of less than about 1.0 μm and second particles having an average mean diameter of from about 1.5 μm to about 5 μm.5. The composite material of claim 4 , wherein the composite material is configured as at least a portion of a rocket ...

RESIN FORMULATIONS FOR POLYMER-DERIVED CERAMIC MATERIALS

This disclosure enables direct 3D printing of preceramic polymers, which can be converted to fully dense ceramics. Some variations provide a preceramic resin formulation comprising a molecule with two or more C═X double bonds or C≡X triple bonds, wherein X is selected from C, S, N, or O, and wherein the molecule further comprises at least one non-carbon atom selected from Si, B, Al, Ti, Zn, P, Ge, S, N, or O; a photoinitiator; a free-radical inhibitor; and a 3D-printing resolution agent. The disclosed preceramic resin formulations can be 3D-printed using stereolithography into objects with complex shape. The polymeric objects may be directly converted to fully dense ceramics with properties that approach the theoretical maximum strength of the base materials. Low-cost structures are obtained that are lightweight, strong, and stiff, but stable in the presence of a high-temperature oxidizing environment. 1. A preceramic resin formulation comprising:(a) first molecules comprising two or more C═X double bonds, two or more C≡X triple bonds, or at least one C═X double bond and at least one C≡X triple bond, wherein X is selected from the group consisting of C, S, N, O, and combinations thereof, and wherein said first molecule further comprises at least one non-carbon atom selected from the group consisting of Si, B, Al, Ti, Zn, P, Ge, S, N, O, and combinations thereof;(b) second molecules comprising R—Y—H;wherein R is an organic group or an inorganic group; wherein, for at least one of said second molecules, R comprises a group having at least one Si atom; and wherein Y is selected from the group consisting of S, N, O, and combinations thereof;(c) a photoinitiator;(d) a free-radical inhibitor; and(e) a 3D-printing resolution agent.2. The preceramic resin formulation of claim 1 , wherein said first molecules comprise one or more functional groups selected from the group consisting of vinyl claim 1 , ethynyl claim 1 , vinyl ether claim 1 , vinyl ester claim 1 , vinyl amide ...

WAFER MOUNTING TABLE AND METHOD OF MANUFACTURING THE SAME

A wafer mounting table includes a first electrode and a second electrode buried inside of a ceramic substrate having a wafer mounting surface so as to be parallel to the wafer mounting surface with the first electrode closer to the wafer mounting surface than the second electrode. The wafer mounting table includes a conductive section that electrically conducts the first electrode and the second electrode. The conductive section is such that a plurality of circular members comprised of plate-shaped metal meshes parallel to the wafer mounting surface are stacked between the first electrode and the second electrode. 1. A wafer mounting table comprising a first electrode and a second electrode buried inside of a ceramic substrate having a wafer mounting surface so as to be parallel to the wafer mounting surface; and a conductive section that electrically conducts the first electrode and the second electrode with the first electrode closer to the wafer mounting surface than the second electrode ,wherein the conductive section is such that a plurality of plate-shaped metal mesh members parallel to the wafer mounting surface are stacked between the first electrode and the second electrode.2. The wafer mounting table according to claim 1 ,wherein a material of the ceramic substrate is included in mesh space of the metal mesh members.3. The wafer mounting table according to claim 1 ,wherein the first electrode and the second electrode are used as electrostatic electrodes, used as RF electrodes, or used as both an electrostatic electrode and an RF electrode.4. The wafer mounting table according to claim 1 ,wherein the first electrode is a disc electrode, and the second electrode is a disc electrode or a ring-shaped electrode which is larger than the first electrode in diameter, and concentric to the first electrode.5. The wafer mounting table according to claim 1 ,wherein the ceramic substrate has a ring-shaped step surface which is outside of and lower than the wafer ...

Ceramic-polymer composites obtained by cold sintering process using a reactive monomer approach

Described herein are cold-sintered ceramic polymer composites and processes for making them from ceramic precursor materials and monomers and/or oligomers. The cold sintering process and wide variety of monomers permit the incorporation of diverse polymeric materials into the ceramic.

Composite Uranium Silicide-Uranium Dioxide Nuclear Fuel

Described herein are Uranium silicide materials as advanced nuclear fuel replacements for uranium dioxide fuel in light water reactors (LWRs) that have advantages over currently used uranium dioxide (UO) via a substantially higher thermal conductivity and, thus, are capable of operating in a reactor at significantly lower temperatures for the same level of power production, plus the heat capacity of a silicide is lower than that of an oxide so that less heat is stored in the fuel that would need to be removed under accident conditions. 1. A replacement nuclear fuel pellet comprising:at least one silicide;uranium dioxide powder;wherein the at least one silicide has higher thermal conductivity than uranium dioxide; andwherein the uranium dioxide powder at least partially surrounds the at least one silicide in a body of the fuel pellet.2. The replacement nuclear fuel of claim 1 , wherein the at least one silicide comprises a uranium silicide.3. The replacement nuclear fuel of claim 1 , wherein the uranium silicide comprises USi.4. The replacement fuel of claim 1 , wherein the at least one silicide is at least one particle sized from 1 μm to 100 μm.5. The replacement fuel of claim 1 , wherein an outer layer of uranium dioxide powder is provided as the exterior layer of the fuel pellet.6. The replacement fuel of claim 1 , wherein the at least one silicide is present by at least 51% by volume in the pellet.7. The replacement fuel of claim 1 , wherein size of uranium dioxide powder particles ranges from 1 to 100 microns.8. A method for making a nuclear fuel pellet comprising: at least one silicide;', 'uranium dioxide powder; and', 'at least one ceramic binder;, 'forming a pellet fromforming at least one green body from the above;sintering the at least one green body in a controlled oxygen furnace to form a nuclear fuel pellet; andwherein the at least one silicide comprises at least 51% of the volume of the nuclear fuel pellet.9. The method of claim 8 , wherein the at least ...

Monolithic ceramic component of gas delivery system and method of making and use thereof

A method of making a monolithic ceramic component of a gas delivery system of a semiconductor substrate processing apparatus wherein the gas delivery system is configured to supply process gas to a gas distribution member disposed downstream thereof. The gas distribution member is configured to supply the process gas to a processing region of a vacuum chamber of the apparatus, wherein the processing region is disposed above an upper surface of a semiconductor substrate to be processed. The method comprises preparing a green compact of ceramic material. The green compact of ceramic material is formed into a form of a desired monolithic ceramic component of the gas delivery system. The formed green compact of ceramic material is fired to form the monolithic ceramic component of the gas delivery system.

Cold sintering of solid precursors

A solid delivery precursor is described, which is useful for volatilization to generate precursor vapor for a vapor deposition process. The solid delivery precursor comprises solid bodies of compacted particulate precursor, e.g., in a form such as pellets, platelets, tablets, beads, discs, or monoliths. When utilized in a vapor deposition process such as chemical vapor deposition, pulsed chemical vapor deposition, or atomic layer deposition, the solid delivery precursor in the form of solid bodies of compacted particulate precursor provide substantially increased flux of precursor vapor when subjected to volatilization conditions, in relation to the particulate precursor. As a result, vapor deposition process operation can be carried out in shorter periods of time, thereby achieving increased manufacturing rates of plays, solar panels, LEDs, optical coatings, and the like.

SILICON PARTICLES FOR BATTERY ELECTRODES

Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight of silicon particles. The silicon particles have an average particle size between about 0.1 μm and about 30 μm and a surface including nanometer-sized features. The composite material also includes greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases is a substantially continuous phase. 116-. (canceled)17. A method of forming a composite material film , the method comprising:providing a mixture comprising a precursor and silicon particles; and pyrolysing the mixture to convert the precursor into one or more types of carbon phases to form the composite material film, wherein at least one of the one or more types of carbon phases comprises a continuous phase that holds the composite material film together such that the silicon particles are distributed throughout the composite material film, wherein the composite material film comprises silicon carbide between the silicon particles and the one or more types of carbon phases, and wherein the composite material film is self-supported.18. The method according to claim 17 , comprisingcasting the mixture on a substrate;drying the mixture;removing the dried mixture from the substrate; andplacing the dried mixture in a hot press.19. The method according to claim 17 , wherein providing the mixture comprises providing a mixture comprising greater than 0% to about 90% by weight of the silicon particles claim 17 , and about 5% to about 80% by weight of the precursor.20. The method according to claim 17 , wherein providing the mixture further comprises providing conductive particles in the mixture.21. The method according to claim 17 , ...

Polysilocarb Materials and Methods

Silicon (Si) based materials and methods of making those materials. More specifically, methods and materials having silicon, oxygen and carbon that form filled and unfiled plastic materials and filled and unfilled ceramics. 168-. (canceled)69. A solvent free method for making a neat solid material , the method comprising:a. preparing a mixture of a first liquid polysilocarb precursor with a second liquid precursor in the absence of a solvent to form a solvent free liquid polysilocarb precursor formulation, whereby the first liquid polysilocarb precursor is not chemically reacted with the second liquid precursor; and,b. curing the polysilocarb precursor formulation to form a neat sold material, whereby the first liquid polysilocarb precursor and the second liquid precursor chemically react to form the neat solid material.70. A reaction free method for making a polysilocarb material , the method comprising:a. obtaining a first liquid polysilocarb precursor;b. obtaining a second liquid polysilocarb precursor comprising a first reactive group;c. obtaining a third liquid polysilocarb precursor comprising a second reactive group; and,d. mixing the first liquid polysilocarb precursor, the second liquid polysilocarb precursor and the third liquid polysilocarb precursor to form a liquid polysilocarb precursor formulation, wherein the first reactive group is unreacted; and the first liquid polysilocarb precursor is not chemically reacted with the second liquid precursor; and,e. curing the polysilocarb precursor formulation to form a neat sold material, whereby the first liquid polysilocarb precursor and the second liquid precursor chemically react to form the neat solid material.71. The method of claim 70 , wherein the first reactive group comprises a hydride claim 70 , and the second reactive group comprises a vinyl.72. The method of claim 70 , wherein the first reactive group comprises a reactive group selected from the group consisting of vinyl claim 70 , allyl claim 70 , ...

ELECTROCHROMIC DEVICE INCLUDING LITHIUM-RICH ANTI-PEROVSKITE MATERIAL

An electrochromic device includes a light transmissive first substrate, a working electrode disposed on the first substrate, a light transmissive second substrate facing the first substrate, a counter electrode disposed on the second substrate, and a lithium-rich anti-perovskite (LiRAP) material disposed between the first and second substrates. The LiRAP material includes an ionically conductive and electrically insulating LiRAP material. 1. An electrochromic (EC) device comprising:a light transmissive first substrate;a working electrode disposed on the first substrate;a light transmissive second substrate facing the first substrate;a counter electrode disposed on the second substrate; anda lithium-rich anti-perovskite (LiRAP) material disposed between the first and second substrates, the LiRAP material comprising an ionically conductive and electrically insulating LiRAP material.2. The EC device of claim 1 , wherein the LiRAP material is represented by the formula LiOX claim 1 , wherein X is F claim 1 , Cl claim 1 , Br claim 1 , I claim 1 , or any combination thereof.3. The EC device of claim 1 , wherein the LiRAP material comprises LiOI.4. The EC device of claim 1 , further comprising a solid state electrolyte disposed between the counter electrode and the working electrode.5. The EC device of claim 4 , wherein the LiRAP material comprises a LiRAP layer disposed between the electrolyte and the counter electrode.6. The EC device of claim 4 , wherein the LiRAP material comprises a LiRAP layer disposed between the electrolyte and the working electrode.7. The EC device of claim 4 , wherein the LiRAP material comprises:a first LiRAP layer disposed between the electrolyte and the counter electrode; anda second LiRAP layer disposed between the electrolyte and the working electrode.8. The EC device of claim 4 , wherein:the working electrode comprises transition metal oxide nanostructures; andthe LiRAP material forms a matrix in which nanostructures of the working ...

Configuring anisotropic expansion of silicon-dominant anodes using particle size

Systems and methods for configuring anisotropic expansion of silicon-dominant anodes using particle size may include a cathode, an electrolyte, and an anode, where the anode may include a current collector and an active material on the current collector. An expansion of the anode during operation may be configured by utilizing a predetermined particle size distribution of silicon particles in the active material. The expansion of the anode may be greater for smaller particle size distributions, which may range from 1 to 10 μm. The expansion of the anode may be smaller for a rougher surface active material, which may be configured by utilizing larger particle size distributions that may range from 5 to 25 μm. The expansion may be configured to be more anisotropic using more rigid materials for the current collector, where a more rigid current collector may comprise nickel and a less rigid current collector may comprise copper.

METHOD OF DEPOSITING ABRADABLE COATINGS UNDER POLYMER GELS

A method of depositing abradable coating on an engine component is provided wherein the engine component is formed of ceramic matrix composite (CMC) and one or more layers, including at least one environmental barrier coating, may be disposed on the outer layer of the CMC. An outermost layer of the structure may further comprise a porous abradable layer that is disposed on the environmental barrier coating and provides a breakable structure which inhibits blade damage. The abradable layer may be gel-cast on the component and sintered or may be direct written by extrusion process and subsequently sintered. 1. A method of depositing an abradable coating on a gas turbine engine component , comprising:forming a slurry mixture comprising at least bi-modal ceramic particulate with up to about 70% by volume of coarse particulate wherein said coarse particulate is at least one of Ln2Si2O7, Ln2SiO5, silica, barium strontium aluminosilicate (BSAS), monoclinic hafnium oxide, rare earth gallium garnet (Ln2Ga2O9), where Ln is at least one of Scandium (Sc), Yttrium (Y), Lanthanum (La), Cerium (Ce), Phraseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), Gadolimium (Gd), Terbium (Tb), Dysprosium (Dy), Hlomium (Ho), Erbium (Er), Thulium (Tm), Ytterbium (Yb), Lutetium (Lu), and up to about 65% by volume of fine particulate, wherein said fine particulate includes at least one of Ln2Si2O7 or Ln2SiO5 where Ln is at least one of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, a polymer solution consisting essentially of one anionic and one cationic dispersant such that the slurry becomes a reversible gel, a low vapor pressure organic solvent and at least one sinter aid selected from the group consisting of iron, aluminum, titanium, cobalt, nickel, gallium, indium, any compounds thereof (e.g. oxides, acetates, oxalates, carbides, nitrides, carbonates, acetylacetonates, nitrates, silicides, compounds containing a rare earth element, mixtures ...

SLURRY PLASMA SPRAY OF PLASMA RESISTANT CERAMIC COATING

Disclosed herein are methods for producing an ultra-dense and ultra-smooth ceramic coating. A method includes feeding a slurry of ceramic particles into a plasma sprayer. The plasma sprayer generates a stream of particles directed toward the substrate, forming a ceramic coating on the substrate upon contact. 1. A method comprising:{'sub': 2', '3', '2', '3', '3', '5', '12', '2', '3', '3', '2', '3', '4', '2', '9', '3', '5', '12', '3', '4', '2', '9', '3', '3', '5', '12', '4', '2', '9', '3, 'feeding a slurry into a plasma sprayer, wherein the slurry includes ceramic particles comprising at least one of ErO, GdO, GdAlO, LaO, YAG, YF, NdO, ErAlO, ErAlO, ErAlO, GdAlO, GdAlO, NdAlO, NdAlO, or NdAlO; and'}generating, with the plasma sprayer, a stream of the ceramic particles directed toward a substrate, wherein the stream of the ceramic particles forms a ceramic coating on the substrate upon contact with the substrate.2. The method of claim 1 , wherein the ceramic coating comprises a ceramic compound comprising YAlOand a solid-solution of YO—ZrO claim 1 , wherein the ceramic coating has a composition selected from a list consisting of:{'sub': 2', '3', '2', '2', '3, '50-75 mol % of YO, 10-30 mol % of ZrO, and 10-30 mol % of AlO;'}{'sub': 2', '3', '2', '2', '3, '40-100 mol % of YO, 0-60 mol % of ZrO, and 0-10 mol % of AlO;'}{'sub': 2', '3', '2', '2', '3, '40-60 mol % of YO, 30-50 mol % of ZrO, and 10-20 mol % of AlO;'}{'sub': 2', '3', '2', '2', '3, '40-50 mol % of YO, 20-40 mol % of ZrO, and 20-40 mol % of AlO;'}{'sub': 2', '3', '2', '2', '3, '70-90 mol % of YO, 0-20 mol % of ZrO, and 10-20 mol % of AlO;'}{'sub': 2', '3', '2', '2', '3, '60-80 mol % of YO, 0-10 mol % of ZrO, and 20-40 mol % of AlO;'}{'sub': 2', '3', '2', '2', '3, '40-60 mol % of YO, 0-20 mol % of ZrO, and 30-40 mol % of AlO;'}{'sub': 2', '3', '2', '2', '3, '30-60 mol % of YO, 0-20 mol % of ZrO, and 30-60 mol % of AlO; and'}{'sub': 2', '3', '2', '2', '3, '20-40 mol % of YO, 20-80 mol % of ZrO, and 0-60 mol % of ...

SPRAYED ARTICLE AND MAKING METHOD

A sprayed article is prepared by thermally spraying ceramic particles of rare earth oxide or fluoride or metal particles of W, Mo or Ta onto an outer or inner surface of a cylindrical carbon substrate to form a sprayed coating, and burning out the carbon substrate, thus leaving the ceramic or metal-base sprayed coating of cylindrical shape having a wall thickness of 0.5-5 mm. 1. A method for preparing a sprayed article , comprising the steps of:providing a carbon substrate of cylindrical shape having outer and inner circumferential surfaces,thermally spraying ceramic particles of a rare earth oxide and/or rare earth fluoride or metal particles of at least one type selected from W, Mo and Ta, onto the outer or inner circumferential surface of the carbon substrate to form a sprayed coating, andcombustion treating the coated substrate to burn out the carbon substrate, thus leaving the ceramic or metal-base sprayed coating of cylindrical shape having a wall thickness of 0.5 to 5 mm.2. A method for preparing a sprayed article , comprising the steps of:providing a carbon substrate of cup shape having outer and inner circumferential surfaces and outer and inner bottom surfaces,thermally spraying ceramic particles of a rare earth oxide and/or rare earth fluoride or metal particles of at least one type selected from W, Mo and Ta, onto the outer circumferential and bottom surfaces or inner circumferential and bottom surfaces of the carbon substrate to form a sprayed coating, andcombustion treating the coated substrate to burn out the carbon substrate, thus leaving the ceramic or metal-base sprayed coating of cup shape having a wall thickness of 0.5 to 5 mm.3. The method of wherein only the step of combustion treating the coated substrate is sufficient to burn out the carbon substrate.4. The method of claim 1 , further comprising the step of machining the carbon substrate to reduce its wall thickness prior to the combustion treating step claim 1 , and the step of combustion ...

SCINTILLATION CRYSTAL, A RADIATION DETECTION SYSTEM INCLUDING THE SCINTILLATION CRYSTAL, AND A METHOD OF USING THE RADIATION DETECTION SYSTEM

A scintillation crystal can include LnREX, wherein Ln represents a rare earth element, RE represents a different rare earth element, y has a value in a range of 0 to 1, and X represents a halogen. In an embodiment, RE is Ce, and the scintillation crystal is doped with Sr, Ba, or a mixture thereof at a concentration of at least approximately 0.0002 wt. %. In another embodiment, the scintillation crystal can have unexpectedly improved linearity and unexpectedly improved energy resolution properties. In a further embodiment, a radiation detection system can include the scintillation crystal, a photosensor, and an electronics device. Such a radiation detection system can be useful in a variety of radiation imaging applications. 1. A well logging apparatus comprising:{'sub': (1−y)', 'y', '3, 'sup': '2+', 'claim-text': RE represents a rare earth element other than La;', 'y has a value in a range of 0 to 1;', 'X represents a halogen; and', {'sup': '2+', 'Me represents Sr, Ba, or any mixture thereof; and'}], 'a scintillation crystal including LaREX:Me, whereinwherein the scintillation crystal has a property including:for a radiation energy range of 60 keV to 356 keV, the scintillation crystal has an average value for a departure from perfect linearity of no less than −0.35%;for a radiation energy range of 2000 keV to 2600 keV, the scintillation crystal has an average value for a departure from perfect linearity of no greater than 0.07%;for a radiation energy range of 60 keV to 356 keV, the scintillation crystal has an absolute value for a furthest departure from perfect linearity of no greater than 0.7%; orany combination thereof.3. The well logging apparatus of claim 1 , wherein the concentration of Me is no greater than 0.03 wt. %.4. The well logging apparatus of claim 1 , wherein the concentration of Me is in a range of 0.005 wt. % to 0.02 wt. %.5. The well logging apparatus of claim 1 , wherein y has a value in a range of 0.001 to 0.5.6. The well logging apparatus of ...

SLURRY PLASMA SPRAY OF PLASMA RESISTANT CERAMIC COATING

Disclosed herein are methods for producing an ultra-dense and ultra-smooth ceramic coating. A method includes feeding a slurry of ceramic particles into a plasma sprayer. The plasma sprayer generates a stream of particles directed toward the substrate, forming a ceramic coating on the substrate upon contact. 1. A method of forming a plasma resistant ceramic coating on a component of a processing chamber , the method comprising: ceramic particles; and', 'a polymer dispersant to facilitate uniform distribution of the ceramic particles; and, 'feeding a slurry into a plasma sprayer, wherein the slurry comprises{'sub': 2', '3', '2', '2', '3, 'generating, with the plasma sprayer, a stream of the ceramic particles directed toward the component, wherein the stream of the ceramic particles forms the plasma resistant ceramic coating on the component upon contact with the component, wherein a composition of the plasma resistant ceramic coating comprises 40 mol % to less than 100 mol % of YO, greater than 0 mol % to 60 mol % of ZrO, and greater than 0 mol % to 10 mol % of AlO, and wherein the ceramic particles of the slurry comprise compositions that result in the composition of the plasma resistant ceramic coating upon contact with the component.'}2. The method of claim 1 , wherein the polymer dispersant comprises at least one of polyacrylic acid claim 1 , ammonium polymethacrylate claim 1 , an omega-3 fatty acid claim 1 , or polyethylene glycol.3. The method of claim 1 , wherein the component comprises a ceramic claim 1 , the method further comprising:after forming the plasma resistant ceramic coating, heating the plasma resistant ceramic coating to a temperature of up to about 2000° C.;heat treating the component and the plasma resistant ceramic coating at the temperature of up to about 2000° C. for a time duration up to about 12 hours; andforming a transition layer between the plasma resistant ceramic coating and the component via the heat treating.4. The method of claim 1 ...

COLD SINTERING COMPOSITES AND CERAMICS

Cold sintering of materials includes using a process of combining at least one inorganic compound, e.g., ceramic, in particle form with a solvent that can partially solubilize the inorganic compound to form a mixture; and applying pressure and a low temperature to the mixture to evaporate the solvent and densify the at least one inorganic compound to form sintered materials. 13-. (canceled)4. A process for preparing a sintered material on a substrate , the process comprising depositing a ceramic on a substrate followed by exposing the deposited ceramic to an aqueous solvent to form a wetted deposited ceramic and applying pressure and heat to the wetted deposited ceramic to sinter the ceramic on the substrate , wherein the applied heat is no more than 200° C. , the applied pressure is no more than 5 ,000 MPa and the ceramic is sintered to a relative density of no less than 85%.5. The process of claim 4 , wherein the sintered material achieves a relative density of at least 85% in a time period of no more than 60 minutes.6. (canceled)7. The process of claim 4 , wherein the solvent includes one or more of a C1-12 alcohol claim 4 , ketone claim 4 , ester claim 4 , or water claim 4 , or an organic acid or mixtures thereof and wherein the solvent has a boiling point below 200° C.8. The process of claim 4 , wherein the solvent includes at least 50% by weight of water.9. The process of claim 4 , wherein the ceramic and the solvent are combined by exposing the ceramic to a controlled relative atmosphere of the solvent.10. The process of claim 4 , wherein the applied heat is at a temperature no more than 250° C.11. (canceled)12. The process of claim 4 , wherein the relative density of the sintered material is greater than 90° %.13. The process of claim 4 , wherein the ceramic has a particle size of less than 30 μm.14. The process of claim 4 , further comprising milling the ceramic prior to forming the wetted deposited ceramic.1517-. (canceled)18. The sintered material of .19. ...

3-D PRINTING OF A CERAMIC COMPONENT

A method for producing the component, and to the use of the component. The method for producing a three-dimensional, ceramic component containing silicon carbide, by a) providing a powdery composition having a grain size (d50) between 3 microns and 500 microns and comprising at least 50 wt % of coke, b) providing a liquid binder, c) depositing a layer of the material provided in a) in a planar manner and locally depositing drops of the material provided in b) onto said layer and repeating step c), the local depositing of the drops in the subsequent repetitions of the step is adapted in accordance with the desired shape of the component to be produced, d) at least partially curing or drying the binder and obtaining a green body having the desired shape of the component, e) carbonising the green body, and 0 siliconising the carbonised green body by infiltration with liquid silicon. 116- (canceled)17. A method for producing a three-dimensional , ceramic component containing silicon carbide , comprising:a) providing a powdered composition having a grain size (d50) of between 3 μm and 500 μm, comprising at least 50 wt. % coke,b) providing a liquid binder,c) planarly depositing a layer of the material provided in a) and locally depositing droplets of the material provided in b) to said layer, and repeating step c), wherein the step of locally depositing the droplets in subsequent repetitions of said step is adjusted according to the desired shape of the component to be produced,d) at least partially curing or drying the binder and obtaining a green body having the desired shape of the component,e) carbonising the green body, andf) siliconising the carbonised green body by means of infiltration with liquid silicon, wherein the green body, while above the melting temperature of silicon and substantially above the surface of a silicon bath, becomes saturated with silicon by means of capillary forces.18. The method according to claim 17 , wherein the coke is selected from the ...

Structure

According to one embodiment, a structure includes a polycrystalline substance of yttrium oxyfluoride as a main component. The yttrium oxyfluoride has a rhombohedral crystal structure, and an average crystallite size of the polycrystalline substance is less than 100 nanometers. When taking a peak intensity of rhombohedron detected near diffraction angle 2θ=13.8° by X-ray diffraction as r1, taking a peak intensity of rhombohedron detected near diffraction angle 2θ=36.1° as r2, and taking a proportion γ1 as γ1(%)=r2/r1×100, the proportion γ1 is not less than 0% and less than 100%.

METHODS OF FORMING TRIURANIUM DISILICIDE STRUCTURES, AND RELATED FUEL RODS FOR LIGHT WATER REACTORS

A method of forming a triuranium disilicide structure comprises forming a mixture comprising uranium particles and silicon particles. The mixture is pressed to form a compact comprising the uranium particles and the silicon particles. The compact is subjected to an arc melting process to form a preliminary triuranium disilicide structure. The preliminary triuranium disilicide structure is subjected to a comminution process to form a fine triuranium disilicide powder. The fine triuranium disilicide powder is pressed to form a green triuranium disilicide structure. The green triuranium disilicide structure is then sintered. Additional methods of forming a triuranium disilicide structure are also described, as are fuel rods for light water reactors. 1. A method of forming an USistructure , comprising:forming a mixture comprising uranium particles and silicon particles;pressing the mixture to form a compact comprising the uranium particles and the silicon particles;{'sub': 3', '2, 'subjecting the compact to an arc melting process to form a preliminary USistructure;'}{'sub': 3', '2', '3', '2, 'subjecting the preliminary USistructure to a comminution process to form a fine USipowder,'}{'sub': 3', '2', '3', '2, 'pressing the fine USipowder to form a green USistructure; and'}{'sub': 3', '2, 'sintering the green USistructure.'}2. The method of claim 1 , wherein forming a mixture comprises:segmenting at least one larger uranium structure into smaller uranium structures;subjecting the smaller uranium structures to at least one hydriding/dehydriding process to form the uranium particles; andcombining at least some of the uranium particles with the silicon particles to form the mixture, the mixture comprising from about 92.7 wt % uranium to about 92.5 wt % uranium and from about 7.3 wt % silicon to about 7.5 wt % silicon.3. The method of claim 1 , wherein pressing the mixture to form a compact comprises:providing at least a portion of the mixture into a cavity of a container, ...

STRUCTURE

A structure includes a polycrystalline substance of yttrium fluoride, wherein an average crystallite size in the polycrystalline substance is less than 100 nanometers. When taking a peak intensity detected near diffraction angle 2θ=24.3° by X-ray diffraction as α, and taking a peak intensity detected near diffraction angle 2θ=25.7° as β, a peak intensity ratio α/β of the structure is not less than 0% and less than 100%. 1. A structure including a polycrystalline substance of yttrium fluoride , an average crystallite size in the polycrystalline substance being less than 100 nanometers ,when taking a peak intensity detected near diffraction angle 2θ=24.3° by X-ray diffraction as α, and taking a peak intensity detected near diffraction angle 2θ=25.7° as β,a peak intensity ratio α/β being not less than 0% and less than 100%.2. The structure according to claim 1 , whereinwhen taking a peak intensity detected near diffraction angle 2θ=29.1° by X-ray diffraction as ε,a proportion of the ε to the α is less than 1%. This application is a divisional of U.S. patent application Ser. No. /,, filed Sep. , , which is based upon and claims the benefit of priority from Japanese Patent Application No. -, filed on Nov. , , and the benefit of priority from Japanese Patent Application No. -, filed on Sep. , . The entire contents of each of these prior applications are incorporated herein by reference.Embodiments of the invention relate generally to a structure.As a member used under a plasma irradiation environment such as a semiconductor manufacturing apparatus, a member having a highly plasma resistant coat formed on the surface of the member is used. The coat is based on, for example, an oxide such as alumina (AlO), yttria (YO) or the like, or a nitride such as aluminum nitride (AlN) or the like.On the other hand, in an oxide-based ceramics, a volume of a film expands and a crack or the like occurs with fluoridation due to a reaction with a CF-based gas, and as a result, particles ...

Method of making a fiber preform for ceramic matrix composite (cmc) fabrication

A method of making a fiber preform for ceramic matrix composite (CMC) fabrication that utilizes a fugitive binder and a machining step is described. The method includes, according to one embodiment, laying up a plurality of plies to form a stack, where each ply comprises an arrangement of fibers. The stack is infiltrated with a polymer at an elevated temperature to form an infiltrated stack that is cooled to form a rigid preform. The rigid fiber preform is machined to have a predetermined shape, such that a machined fiber preform is formed. A composite assembly including the machined fiber preform is formed and then the composite assembly is heated at a sufficient temperature to pyrolyze the polymer. Thus, a porous preform of a predetermined geometry is formed for further processing into a CMC.

FLOW PATH ASSEMBLIES FOR GAS TURBINE ENGINES AND ASSEMBLY METHODS THEREFORE

Flow path assemblies and methods for forming such flow path assemblies for gas turbine engines are provided. For example, a flow path assembly for a gas turbine engine has a boundary structure, an airfoil, and a locking feature. The boundary structure and the airfoil are formed from a composite material. The boundary structure defines an opening and a cutout proximate the opening, and the airfoil is sized to fit within the opening of the boundary structure. The locking feature is received within the cutout defined by the boundary structure to interlock the airfoil with the boundary structure. 1. A flow path assembly for a gas turbine engine , the flow path assembly comprising:a boundary structure formed from a composite material and defining an opening, the boundary structure further defining a cutout proximate the opening;an airfoil formed from a composite material and sized to fit within the opening of the boundary structure; anda locking feature received within the cutout defined by the boundary structure to interlock the airfoil with the boundary structure, the locking feature being located between the boundary structure and the airfoil.2. The flow path assembly of claim 1 , wherein the locking feature is a locking ring claim 1 , and wherein the opening defined by the boundary structure extends between an outer end and an inner end claim 1 , and wherein the locking ring extends toward the outer end of the opening and projects into the opening so as to define a recess between the locking ring and the boundary structure claim 1 , and wherein the airfoil comprises a locking portion that fills the recess to interlock the airfoil with the boundary structure.3. The flow path assembly of claim 2 , wherein the recess and the locking portion are V-shaped.4. The flow path assembly of claim 1 , wherein the locking feature is integrally formed with the airfoil.5. The flow path assembly of claim 4 , wherein the opening defined by the boundary structure extends between an ...

A COMPOSITE MATERIAL PART INCLUDING AN INTERPHASE LAYER OF ALUMINUM-DOPED BORON NITRIDE

A composite material part includes fiber reinforcement made of carbon or ceramic yarns and a matrix that is mostly ceramic, the part further including a first interphase layer covering the yarns and present between the yarns and the matrix, the first interphase layer being a layer of boron nitride doped with aluminum and presenting an atom content of aluminum lying in the range 5% to 15%. 1. A composite material part comprising fiber reinforcement made of carbon or ceramic yarns and a matrix that is mostly ceramic , the part further comprising a first interphase layer covering the yarns and present between the yarns and the matrix , said first interphase layer being a layer of boron nitride doped with aluminum and presenting an atom content of aluminum lying in the range 5% to 15%.2. A part according to claim 1 , wherein the first interphase layer presents an atom content of aluminum lying in the range 5% to 12%.3. A part according to claim 2 , wherein the first interphase layer presents an atom content of aluminum lying in the range 7% to 12%.4. A part according to claim 1 , wherein the first interphase layer is in contact with the yarns.5. A part according to claim 1 , wherein the part further comprises a second interphase layer of boron nitride situated between the yarns and the first interphase layer.6. A part according to claim 5 , wherein the first interphase layer is in contact with the second interphase layer.7. A part according to claim 1 , wherein the part includes a layer comprising silicon in contact with the first interphase layer.8. A part according to claim 7 , wherein the layer including silicon is present between the yarns and the first interphase layer.9. A method of fabricating a part according to claim 1 , the method comprising:forming the first interphase layer on the yarns;making a fiber preform forming the fiber reinforcement of the part that is to be obtained out of the yarns by performing one or more textile operations; andforming a matrix ...

PROCESS FOR 3D PRINTING

The present invention relates to a suspension comprising 50-95% by weight of the total suspension (w/w) of at least one metallic material and/or ceramic material and/or polymeric material and/or solid carbon containing material; and at least 5% by weight of the total suspension of one or more fatty acids or derivatives thereof. In addition, the invention relates to uses of such suspension in 3D printing processes. 1. A process for 3D printing a 3-dimensional (3D) object , the process comprising: 50-95% by weight of the total suspension (w/w) of at least one polymeric material and/or metallic material; and', 'at least 5% by weight of the total suspension (w/w) of one or more fatty acids or derivatives thereof; and, 'a) providing a suspension comprisingb) 3D printing the desired object using the suspension as a feedstock;wherein said fatty acid derivatives comprises at least one acid group from the group consisting of carboxylic acid, phosphonic acid and sulfonic acid group attached to at least one C5-C30 hydrocarbon.2. The process according to claim 1 , comprising at least one polymeric material.3. The process according to claim 1 , wherein the polymer material is selected from the group consisting of polylactic acid (PLA) claim 1 , polycaprolactone (PCL) claim 1 , polyglycolic acid (PGA) claim 1 , polystyrene (PS) claim 1 , polyethylene (PE) claim 1 , polypropylene (PP) claim 1 , polycarbonate (PC) claim 1 , poly(methyl methacrylate) (PMMA) claim 1 , poly(1 claim 1 ,4-phenylene sulfide) (PPS) claim 1 , poly(2 claim 1 ,6-dimethyl-1 claim 1 ,4-phenylene oxide) (PPO) claim 1 , polyamide (PA) claim 1 , polybutylene terephthalate (PBT) claim 1 , polyetheretherketone (PEEK) claim 1 , polyetherketone (PEK) claim 1 , polyethylene terephthalate (PET) claim 1 , polyimide (PI) claim 1 , polyoxymethylene (POM) claim 1 , polysulfone (PSU) claim 1 , polyurethane (PU) claim 1 , polybutadiene (PB) claim 1 , polytetrafluoroethyelen (PTFE) claim 1 , polyvinylfluoride (PVF) claim 1 , ...