СВЕРХПРОВОДЯЩИЙ КАБЕЛЬ И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

Изобретение относится к области электротехники, в частности к сверхпроводящему кабелю и способу его изготовления. Полый сверхпроводящий кабель (1) имеет наружную трубчатую оболочку (2) с круглым внутренним поперечным сечением и цилиндрической внутренней стенкой (3), центральный канал (4) охлаждения с многоугольным или круглым поперечным сечением, меньшим внутреннего поперечного сечения наружной трубчатой оболочки (2). Между наружной трубчатой оболочкой (2) и каналом (4) охлаждения расположены профилированные сверхпроводящие проводники (5). Эти профилированные сверхпроводящие проводники (5) имеют в поперечном сечении форму, соответствующую форме замкового камня, как он известен в конструкции римских каменных мостов или крестовых сводов. Для этого контур поперечного сечения профилированных сверхпроводящих проводников имеет, по меньшей мере, один наружный изогнутый участок (7) и внутренний участок (8), причем наружный изогнутый участок (7) согласован с внутренним радиусом наружной трубчатой ...

СВЕРХПРОВОДЯЩИЙ ПРОВОД, СВЕРХПРОВОДЯЩИЙ МНОГОЖИЛЬНЫЙ ПРОВОД С ЕГО ИСПОЛЬЗОВАНИЕМ И СПОСОБ ИХ ИЗГОТОВЛЕНИЯ

... 1. Сверхпроводящий провод, содержащий оксидный сверхпроводник и металлическую оболочку, покрывающую упомянутый оксидный сверхпроводник, причем материал упомянутой металлической оболочки при испытании деформации от напряжения характеризуется разрушающей деформацией в по меньшей мере 30%. 2. Сверхпроводящий провод по п.1, в котором упомянутая разрушающая деформация находится в пределах диапазона от 30 до 58%. 3. Сверхпроводящий провод по п.1, в котором упомянутая разрушающая деформация находится в пределах диапазона от 45 до 58%. 4. Сверхпроводящий провод по п.1, в котором доля упомянутого оксидного сверхпроводника находится в пределах диапазона от 25 до 70%. 5. Сверхпроводящий провод по п.1, в котором материал упомянутой металлической оболочки при испытании деформации от напряжения характеризуется максимальным напряжением в по меньшей мере 180 МПа. 6. Сверхпроводящий провод по п.1, в котором материал упомянутой металлической оболочки содержит серебро и/или серебряный сплав. 7. Сверхпроводящий ...

Supraleitendes Oxid und Verfahren zu seiner Herstellung

Niobium alloy type superconductor wire for superconductor magnet, has niobium alloy filaments heated with composite reinforcing material with larger mechanical strength

A filament aggregate has several niobium alloy filaments arranged in the copper-tin type alloy matrix. The niobium alloy type superconductor compound is generated by heating aggregate with the reinforcing material whose mechanical strength is larger.

Elektrischer Leiter mit mehreren durch Matrixmaterial getrennten Teilleitern

Es wird ein elektrischer Leiter (1) zur Herstellung einer Statorwicklung (34) eines Stators (33) einer elektrischen Maschine (31) angegeben. Der Leiter (1) umfasst mehrere Teilleiter (3a, 3b) aus einem bei 4,2 K normalleitenden Material, wobei diese Teilleiter (3a, 3b) durch ein elektrisch höher resistives normalleitendes Matrixmaterial (5) voneinander getrennt sind, wobei das Matrixmaterial (5) einen niedrigeren Schmelzpunkt aufweist als das Material der Teilleiter (3a, 3b) und wobei das Matrixmaterial (5) eine spezifische Wärmeleitfähigkeit von wenigstens 10 W/m·K aufweist. Weiterhin wird Leiterverbund (21) mit mehreren derartigen Leitern (1) angegeben, die gegeneinander verseilt sind. Es wird außerdem eine elektrische Maschine angegeben, die wenigstens eine Statorwicklung (34) mit einem derartigen Leiter aufweist. Schließlich wird ein Verfahren zur Herstellung eines solchen Leiters (1) angegeben.

VERFAHREN ZUR HERSTELLUNG VON SUPRALEITERN MIT EINER VIELZAHL AN FASERN.

SUPRALEITENDES KABEL.

SUPERCONDUCTING ARTICLES

MAKING SUPERCONDUCTORS

A superconducting cable

... 1101617 Super-conductors UNITED STATES ATOMIC ENERGY COMMISSION 8 Oct 1965 [29 Oct 1964] 42897/65 Headings H1A A5 and A4D A cable is made from hard super-conductors 10 such as niobium-tin, niobium-zirconium and niobium-titanium, encased in a coating having normal electrical and mechanical conductivity at the temperature of liquid helium, in the example given, aluminium. The rectangular configuration shown leads to high field uniformity and avoids hot spots but other configurations are possible. The super-conductors are of ten mils diameter and the size of the aluminium coating is 0À1 x 0À6 inch. The cable is produced by drawing super-conductors from spools, through an acid cleaning bath and a heated extrusion head the super-conductors being in tension in order to maintain their spacing.

Improvements in or relating to superconducting cables

... 1,130,464. Superconducting cables. MASCHINENFABRIK OERLIKON. 11 Jan., 1967 [13 Jan., 1966], No. 1417/67. Heading H1A. A superconductive cable comprises superconductors 3 surrounded by a contact member 4 bonded to the superconductors. The superconductors shown are plated at 5 with e.g. copper or silver and the contact member is bonded by a bonding metal 7 such as indium. The superconductors run axially parallel to the cable and the contact member is formed by a sleeve folded round the core. Further embodiments (Figs. 2-12, not shown), comprise respectively contact members (10) forming part of the core, multiple layers of superconductors, profiled contact members (14), contact members seamed at the side, contact members having overlapping seams (15), sideseamed contact members adjacent reinforcing members (18), contact members in two parts (19), (20) giving interlocking windings (24), rectangular cross-section superconductors and charging apertures (39) for entry of bonding material.

STABILIZED SUPERCONDUCTOR

... 1383889 Super-conductors BBC BROWN BOVERI & CO Ltd 20 July 1973 [20 July 1972] 34669/73 Headings H1A A5 A3M and A4D An electrically poorly conductive layer is formed around each filament 2 of a multi-filament super-conducting cable by heating so that the material of an electrically highly conductive matrix carrying the filaments interdiffuses with either the super-conductor itself or with another electrically conductive material surrounding the filaments 2 to form the relatively poorly conductive layer. In a simple embodiment NbTi rods are inserted in a Cu sheath and drawn to form a wire, many of which are stranded together and rolled to form a cable of NbTi filaments in a Cu matrix. The cable is then heated to a temperature which causes a highly resistive layer of CuTi to form round each filament. In the embodiment shown in Fig. 2, NbTi filaments 2 are surrounded by Cu4, Zn 5 and a Cu matrix, and on heating a relatively resistive Cu-Zn layer forms round each filament. In a third embodiment ...

Superconducting tapes for alternating current and cables and other conductors in which they are used

METHOD OF MANUFACTURING LONG LENGTH COMPOSITE SUPERCONDUCTORS

... 1316984 Super-conductors COMPAGNIE FRANCAISE THOMSON HOUSTON-HOTCHKISS BRANDT 17 July 1970 [18 July 1969] 34901/70 Headings H1A and A4D Stabilized super-conductor composites are applied to the surface of an elongate base support at a temperature permitting retention of the superconductor's properties by merging the composites into the surface of the support, the composites being applied so that the super-conductor filaments are inclined at an angle to the major axis of the support. The composites may comprise Cu strips or wires containing one or a plurality of super- conductor filaments. The filaments may extend parallel to the axis of the composite or be transposed. As shown, a plurality of stabilized superconductor composites are laid on to a heated Cu tube 31 in a protective atmosphere and the assembly is then drawn down by means of die 37 and core 38 to merge the composites into the surface of the tube. The tube is heated by passing an electric current through it, by RF heating, or ...

COATED SUPERCONDUCTING WIRE

WIRE FOR NB3X SUPERCONDUCTOR WIRE

ELECTRICAL CONDUCTOR FOR VARIABLES RIVER

KNUEPPEL ZUR DRAHT- ODER FILAMENT-HERSTELLUNG DURCH EXTRUSION

Procedure for the production of a superconductor

Superconductor and procedure for their production

METHOD OF PRODUCING SUPERCONDUCTING WIRE

EXPANDED METAL CONTAINING WIRES AND FILAMENTS AND METHODS OF PRODUCING THE SAME

A wire filament or multifilament wire or cable having an expanded metal or foraminous metal concentrically or semiconcentrically layered along the length of the wire so that the spaces or holes in the metal open radially of the wire or filament. The expanded or foraminous metal can be used in said wires or filaments as a strengthening layer, a conducting layer, or a diffusion barrier layer.

MANUFACTURE OF A3B SUPERCONDUCTORS WITH BARRIER LAYER SYSTEM EMPLOYING METAL A

A superconductor of the general formula A3B, e.g. Nb3Sn, is manufactured by mechanical fabrication of A filaments in a bronze containing B followed by heat treatment to form A3B by solid state reaction from B diffusing through the bronze without melting of the bronze. A pure metal for stabilisation is mechanically fabricated together with the other components and protected from diffusion thereinto of any of the other components by a barrier layer of A metal. Superconductor formation on the harrier layer of A metal during the heat treatment is avoided or reduced by surface treatment or surface coating which inhibits A3 reaction between A and B at the barrier.

METHOD FOR THE MANUFACTURE OF A SUPERCONDUCTOR HAVING AN INTERMETALLIC TWO ELEMENT OUND

A method of manufacturing a superconductor having a superconductive intermetallic compound of at least two elements in which a core of a normally conductive metal is surrounded with a jacket containing a ductile first component of the compound, the jacket itself being surrounded with a sheath of an alloy containing a ductile carrier metal and a second component of the compound, after which this composite structure is subjected to a cross-section reducing process and then heat treated whereby the jacket thickness and the heat treating time and temperature are chosen such that the second component in the sheath will diffuse into the jacket and react with the first component to form the compound without passing through the jacket and contaminating the core.

SUPERCONDUCTING TAPES

A composite superconducting tape (1) comprising a plurality of stacks and diffusion bonded superconducting tapes, each comprising a filament (5) of superconducting material, for example BSCCO-2223 in a silver/silver alloy cladding (7), such that each elongate component extends longitudinally.

MANUFACTURE OF A3B SUPERCONDUCTORS BY DECOMPOSITION OF ALKYL COMPOUNDS

TYROSINE KINASE INHIBITORS AND BENZOYLACRYLAMIDE DERIVATIVES

Benzoylacrylamide derivatives of the formula (I): (I) wherein R1 and R2 each independently represent a hydrogen atom, C1 ~ C5 alkyl, C3 ~ C8 cycloalkyl optionally intervened by -NR8- (R8 represents phenyl or C1 ~ C5 alkyl which is unsubstituted or substituted with phenyl), (n is an integer of 0 to 3 and X and Y each independently represent a hydrogen atom, a halogen atom, C1 ~ C5 alkyl or C1 ~ C5 alkoxy), -(CH2)m-A (m is an integer of 0 to 3 and A represents an optionally substitued heterocycle), -COR9 (R9 represents C1 ~ C5 alkyl which is unsubstituted or substituted with phenyl, phenyl which is unsubstituted or substituted with C1 ~ C5 alkyl or a halogen atom, or C1 ~ C5 alkoxy which is unsubstituted or substituted with phenyl) -SO2R10 (R10 represents C1 ~ C5 alkyl which is unsubstituted or substituted with phenyl or a halogen atom, or phenyl which is unsubstituted or substituted with C1 ~ C5 alkyl), or -OR11 (R11 represents a hydrogen atom, or C1 ~ C5 alkyl which is unsubstituted ...

BENZOHETEROCYCLIC COMPOUNDS

Novel benzoheterocyclic compound of formula (I) and pharmaceutically acceptable salts thereof, which show excellent antivasopressin activity and oxytocin antagonistic activity, and are useful as a vasopressin antagonist or oxytocin antagonist. A is a 5- or 6-membered unsaturated heterocyclic residue having 1 to 2 heteroatoms. B1 and B2 are each methylene or a group of the formula: -NR8- (wherein R8 is a hydrogen atom or a lower alkyl group).

DRAWING PROCESS FOR MAKING A HIGH CRITICAL TEMPERATURE SUPERCONDUCTING FIBRE AND FIBRE SO OBTAINED

PROCESS FOR DIVIDING A SILVER-MATRIX HTC SUPERCONDUCTOR MULTIFILAMENT STRAND, AND MULTIFILAMENT STRAND THEREBY PRODUCED

Procédé de fabrication du type poudre en tube d'un brin multifilamentaire supraconducteur HTc à matrice à base d'argent, dans lequel : préalablement à l'étape monofilamentaire : on prépare un matériau multicouche composite comprenant au moins une feuille à base d'argent et au moins une couche de matériau céramique non supraconductrice, perméable à l'oxygène, et durant l'étape monofilamentaire on intercale une épaisseur de matériau multicouche composite entre une première et une deuxième épaisseur de matériau à base d'argent, formant ainsi ladite une première enveloppe à base d'argent.

A MULTIFILAMENTARY SUPERCONDUCTING COMPOSITE AND METHOD OF MANUFACTURE

The invention provides a multifilamentary superconducting composite article (100) comprising multiple substantially electrically decoupled domains (106, 108, 110, 112, 114, 116), each including one or more fine, preferably twisted filaments (130, 132, 134) of a desired superconducting oxide material. In a preferred embodiment, the article (100) comprises a matrix (104), which substantially comprises a noble metal, a conductive jacketing layer (102) surrounding the matrix (104), a plurality of discrete filament decoupling layers (118, 120, 122, 124, 126, 128, 136), each comprising an insulating material, disposed within the matrix (104) to separate the matrix (104) into a plurality of substantially electrically decoupled domains (106, 108, 110, 112, 114, 116): a plurality of filaments (130, 132, 134), each comprising a desired superconducting oxide, which are disposed within and essentially encapsulated by the matrix (104) and chemically isolated thereby from the decoupling layers (118, ...

DECOUPLING OF SUPERCONDUCTING ELEMENTS IN HIGH TEMPERATURE SUPERCONDUCTING COMPOSITES

An oxide superconducting cable is provided having a plurality of strands comprised of at least one oxide superconductor filament sheathed in a ductile and conductive metal matrix and at least one of said strand further comprising a substantially continuous high resistivity coating substantially surrounding said at least one strand. The strands are positioned and arranged to form a cable. The cable is prepared by (a) applying a ductile predecessor coating to a plurality of strands, each said strand comprised of at least one oxide superconductor filament or a precursor thereto sheathed in a ductile metal matrix, and the ductile predecessor capable of conversion into a high resistivity material; (b) assembling the plurality of strands into a cable; and (c) converting the ductile predecessor into a high resistivity material, where steps (a) and (b) can be performed in any order.

Rohling für die Herstellung von supraleitendem Verbunddraht auf der Basis von Nb3Sn.

Die Erfindung bezieht sich auf das Gebiet der Elektrotechnik bei der Herstellung von Verbunddrähten auf der Basis von supraleitenden Verbindungen, die zur Herstellung elektrischer Produkte bestimmt sind. Ein erfindungsgemässer Rohling für die Herstellung eines supraleitenden Verbunddrahts auf der Basis von Nb 3 Sn umfasst ein Kupfergehäuse (1), in dem sich eine kupferhaltige Matrix (2) befindet, in deren Zentrum ein zinnhaltiger Stab (3) angeordnet ist, um den herum viele niobhaltige Stäbe (4) in einer kupferhaltigen Hülle (5) liegen, wobei die kupferhaltige Matrix (2) von einer Diffusionsbarriere (6) umgeben ist, wobei ein niobhaltiger Stab (4) einen Verbundstoff darstellt, der eine Matrix aus Niob oder seiner Legierung enthält, die mit Fasern aus der Nb-Ti-Legierung verstärkt ist, die sich in einem Abstand von mindestens einer durchschnittlichen Fasergröße der Fasern aus der Nb-Ti-Legierung zur Grenze der kupferhaltigen Hülle (5) befinden und deren Abstand mindestens eine durchschnittliche ...

Spindel für Spinn- und Zwirnmaschinen

Elektrisch leitender Draht

Supraleitendes Kabel und Verfahren zu dessen Herstellung

Voll- oder teilweise stabilisierter, aus supraleitenden und normalleitenden Metallen zusammengesetzter Leiter

Verfahren zur Herstellung eines Supraleiters

Reinforced superconductor material

A super conductor wire is made as a composite with reinforcing metal. A number of superconductor wires made from niobium - 44 wt.% titanium alloy are embedded into a grooved strip of Cu/Zr, Cu/Be or Cu/Al alloy. The reinforcing and superconducting alloys are in good thermal and electrical contact. This wire is used for superconduction at cryogenic temps.

Elément supraconducteur pour le transport de courant continu et alternatif et utilisation de cet élément

Verfahren zur Herstellung eines Supraleiters

Verfahren zur Herstellung eines supraleitfähigen Materials

Procédé de fabrication de corps supraconducteurs creux stabilisés

Procédé et dispositif de fabrication d'un conducteur supraconducteur composite et produit obtenu par ce procédé

Corps supraconducteur composite et procédé de fabrication de celui-ci

Long stabilized superconductors prodn

Long, stabilized, superconductors prodn. Composite superconductor as in FR 1584 811 is made by assembling composite mono- or multi-filament wires and strips of stabilising material, e.g. Al or Cr. The composite wires are embedded in the strips by hot-rolling at 300-600 degrees C. A cryogenic fluid circulation channel is formed in the finished product by joining various assembly components, before or after rolling to create an inner free space between them.

Supraleiter mit einer Isolation an seiner Oberfläche

Kabelförmiger Supraleiter

Supraleitendes Kabel

Supraleitendes Kabel und Verfahren zu dessen Herstellung

Verfahren zur Herstellung eines bandförmigen stabilisierten Supraleiters und Anwendung des Verfahrens

Verfahren zur Herstellung von supraleitenden metallischen Leitern

Supraleiteranordnung, bestehend aus zwischen Tragkörpern angeordneten, stabilisierten Supraleitern

Elektrischer Leiter mit einer Anzahl von Einzeldrähten aus einem Material, das elektrische Supraleitfähigkeit aufweist

Verfahren zur Herstellung eines aus mindestens einem Supraleiter und aus normalleitenden Metallen zusammengesetzten Leiters

METHOD OF MANUFACTURING METAL COMPOSITES AND APPLICATION FOR OBTAINING A SUPERCONDUCTOR.

PROCEDURE FOR MANUFACTURING A SUPERCONDUCTOR WITH A FROM AT LEAST TWO ELEMENTS EXISTENCE SUPERCONDUCTING ONE INTER+METALLIC CONNECTION.

SUPERCONDUCTING COMPOUND LEADER AND PROCEDURE FOR ITS PRODUCTION.

WIRE OR FILAMENT TIRE SENSORS AND METHOD OF MAKING SAME.

ELECTRICAL SUPERCONDUCTOR AS WELL AS PROCEDURE FOR ITS PRODUCTION.

SUPERCONDUCTOR WITH HIGH STROMFUEHRUNGSVERMOEGEN.

SUPERCONDUCTOR ARRANGEMENT.

Preparation method of copper-niobium reinforced matrix for Nb3Sn wire fabricated by bronze process

SUPERCONDUCTOR HAS MULTIPLE FILAMENTS

PROCESS OF DECOUPLING Of a SUPERCONDUCTIVE BIT MULTIFILAMENTAIRE HTC AMATRICE CONTAINING MONEY, AND BIT MULTIFILAMENTAIRE THUS CARRIED out

MANUFACTORING PROCESS Of a DRIVER TWIST IN SUPERCONDUCTOR SHEATHS HAS HIGH CRITICAL TEMPERATURE

SUPRACONDUCTEUR

Supraconducteur. Il est composé d'un certain nombre de conducteurs élémentaires et pourvu d'au moins un dispositif de refroidissement et d'au moins un conducteur de stabilisation. Le supraconducteur est divisé en plusieurs conducteurs élémentaires ou groupes de conducteurs élémentaires. Au moins quelques uns desdits conducteurs ou desdits groupes de conducteurs présentent leur propre dispositif de refroidissement ou sont adjacents à un tel dispositif. Supraconducteur.

Structure of superconductive electric cable

PROCEDE POUR LA PREPARATION DE FILS SUPRACONDUCTEURS A PARTIR DE FILAMENTS MULTIPLES CONTENANT DU NIOBIUM ET DE L'ALUMINIUM, ENTOURES DE CUIVRE OU D'ALLIAGE DE CUIVRE

A.PROCEDE POUR LA PREPARATION DE FILS SUPRACONDUCTEURS A PARTIR DE FILAMENTS MULTIPLES CONTENANT DU NIOBIUM ET DE L'ALUMINIUM, ENTOURES DE CUIVRE OU D'ALLIAGE DE CUIVRE. B.PROCEDE CARACTERISE EN CE QUE L'ON OBTIENT AUSSI BIEN LA CONFIGURATION DE FILAMENTS MULTIPLES QUE LA FORMATION DE LA PHASE A15 SUPRACONDUCTRICE, A PARTIR DE PARTIES CONSTITUTIVES SE TROUVANT DANS UN TUBE. C.PROCEDE APPLICABLE A LA FABRICATION INDUSTRIELLE DES AIMANTS SUPRACONDUCTEURS.

PROCEEDED FOR the MANUFACTURE Of a FLEXIBLE SUPERCONDUCTOR, CONSTITUTES BY a CARBON FIBRE CARRYING a THIN LAYER Of ONE COMPOSES OF the NIOBIUM OF GENERAL FORMULA NBCXNY AND an EXTERNAL METAL LAYER HIGHLY CONDUCTING

SUPERCONDUCTIVE BIT MULTIFILAMENTAIRE HTC AND a MANUFACTORING PROCESS Of SUCH a BIT

MANUFACTURE OF A COMPOSITE ELECTRICAL CONDUCTOR INCLUDING A SUPERCONDUCTIVE CONDUCTOR CONSISTING OF ANINTERMETALLIC SUPERCONDUCTOR COMPOUND

Method for preparing a superconductor

A PROCESS FOR THE PRODUCTION OF SUPERCONDUCTIVE METALLIC CONDUCTORS

SUPERCONDUCTOR

PROCESS OF TEXTURE Of a SUPERCONDUCTIVE DRIVER HTC, DRIVER CARRIED out ACCORDING TO SUCH a PROCESS

L'invention concerne un conducteur multifilamentaire supraconducteur HTc à matrice à base d'argent (2) et à matériau supraconducteur (3) (Bi1-x Pbx )2 Sr2 Cay Cu1+y O6+2y avec x member [0; 0, 4] et y member 0, 1, 2 } texturé présentant un taux de courts-circuits (1) entre filaments (3) inférieur à 1 pour 100 m de conducteur.

Superconducting cable

Production method of Bi-2223-based superconducting wire

To provide a production method of Bi-2223-based superconducting wire having the following steps: a preparing step that prepares a powdered precursor 11 in which a Bi-2212 phase is used as a primary phase and the remainders are a Bi-2223 phase and a non-conducting phase; a filling step that fills the precursor into a metallic pipe at a pressure of 1000 Pa or less; a sealing step that seals the metallic pipe filled with the precursor at a pressure of 1000 Pa or less to decrease the invasion of an impurity gas and raise the critical current value.

SUPERCONDUCTING MAGNET, MRI, AND NMR

The purpose of the present invention is to provide a permanent current switch having increased heating efficiency by simplifying the configuration and reducing the heat capacity of a permanent current switch. To achieve the above purpose, this superconductor magnet has a superconducting coil, a permanent current switch, and an AC power source, a pulse current source, or a charge/discharge circuit. The AC power source, pulse current source, or charge/discharge circuit is connected to a loop circuit comprising the superconducting coil and the permanent current switch so as to be parallel to the permanent current switch.

A MULTIFILAMENTARY SUPERCONDUCTING COMPOSITE AND METHOD OF MANUFACTURE

The invention provides a multifilamentary superconducting composite article (100) comprising multiple substantially electrically decoupled domains (106, 108, 110, 112, 114, 116), each including one or more fine, preferably twisted filaments (130, 132, 134) of a desired superconducting oxide material. In a preferred embodiment, the article (100) comprises a matrix (104), which substantially comprises a noble metal, a conductive jacketing layer (102) surrounding the matrix (104), a plurality of discrete filament decoupling layers (118, 120, 122, 124, 126, 128, 136), each comprising an insulating material, disposed within the matrix (104) to separate the matrix (104) into a plurality of substantially electrically decoupled domains (106, 108, 110, 112, 114, 116): a plurality of filaments (130, 132, 134), each comprising a desired superconducting oxide, which are disposed within and essentially encapsulated by the matrix (104) and chemically isolated thereby from the decoupling layers (118, ...

PROCESS OF PRODUCING SUPERCONDUCTING ALLOYS

A type II superconducting alloy which is superconducting at a predetermined high magnetic field is prepared by creating a composite having a periodic arrangement of at least two transition metals so as to provide numerous interfaces between the different transition metals including niobium, titanium, zirconium, vanadium, hafnium, and tantalum, and alloys thereof. The combination of transition metals is such that one of the metals will serve as a second phase when the layers are subjected to temperatures which would produce a two-phase equilibrium state from a solid solution alloy of the transition metals. The composite is mechanically reduced and heated to cause interdiffusion of the transition metals to form ductile superconducting alloy zones at the interfaces of the transition metals. Sufficient heat treatment is provided in the region where two phases exist in the phase diagram to form two phases, one phase being the desired superconducting Type II alloy and the other phase being the ...

Process for producing compound based superconductor wire

A process for producing a compound-based semiconductor wire having a high mechanical strength and which can be coiled so as to be cooled efficiently. A starting composition is formed by blending at least one metal powder selected from among Nb-based and V-based particles having at least a partial surface coating of an alloy or metal selected from Cu-Sn-based and Ga-based metal layers with at least one of Cu-based, Sn-based, Ga-based, Cu-Sn-based and Cu-Ga-based metal or alloy powder. The cross-sectional area of the composition is reduced followed by a heat treatment. The composition is then drawn into a wire of desired diameter.

Superconducting wire and composite superconductor

A superconducting wire saved in weight and enhanced in mechanical properties is provided without damaging electric and thermal characteristics as an Al stabilizer, and further a method for producing the same, a high strength Al sintered alloy and powders used for the process are provided. A superconducting wire comprising an Al alloy of a high purity Al in which a small amount of ceramic ultrafine particles are dispersed and superconducting filaments embedded in the Al alloy, in which a large number of the ceramic ultrafine particles are dispersed in the area of 1 μm2, and the areas of 1 μm2 in which a large number of the ceramic ultrafine particles are dispersed, are formed over nearly the whole of the alloy.

Method of fabricating superconductive electrical conductor

A method of fabricating a superconductive electrical conductor of Nb3 Sn type comprises a step of covering an elongated core member made of Nb with a covering member made of a third element selected from the group consisting of Ti, Ta, In, Hf, Al and Si. The core member covered with the covering member is covered with a tubular matrix made of a Cu-Sn alloy or a combination of Cu with Sn to form a composite wire element. Such wire elements are assembled in a tubular matrix made of a Cu-Sn alloy, Cu or a combination of Cu with Sn and reduced in diameter to form a multi-core composite wire element having a desired diameter. The assembling and reducing processing is effected at least one to form a multi-core composite wire which is then subjected to a diffusion heat-treatment to form an intermetallic compound of Nb3 Sn and the third element in the peripheral portion of the core member.

Superconducting members and methods of manufacturing thereof

A superconductor of the general formula A3 B, e.g. Nb3 Sn, is manufactured by mechanical fabrication of A filaments in a bronze containing B followed by heat treatment to form A3 B by solid state reaction from B diffusing through the bronze without melting of the bronze. A pure metal for stabilization is mechanically fabricated together with the other components and protected from diffusion thereinto of any of the other components by a barrier layer of A metal. Superconductor formation on the barrier layer of A metal during the heat treatment is avoided or reduced by surface treatment or surface coating which inhibits A3 reaction between A and B at the barrier.