High volume fraction B4C/Al composite for spent fuel storage grid and preparation method of composite

The invention relates to a high volume fraction B4C/Al composite for a spent fuel storage grid and a preparation method of the composite, in order to solve the problems that the existing high boron carbide content B4C/Al composite is low in density and poor in mechanical property and the wettability of boron carbide and molten aluminum is poor below 1000 degrees. The high volume fraction B4C/Al composite for the spent fuel storage grid is prepared by 55-75% of boron carbide and 25-45% of aluminum or an aluminium alloy according to volume fractions. The method comprises the steps that firstly, a boron carbide prefabricated body is prepared; secondly, molten aluminum is prepared; and thirdly, molten aluminum is pressed into gaps of the prefabricated body by utilizing a pressure infiltration technique, pressure maintaining and demoulding are performed, and the high volume fraction B4C/Al composite is obtained. The prepared B4C/Al composite is high in density and good in mechanical property ...

Composite silicone grease with high thermal conductivity and preparation method thereof

The invention relates to composite silicone grease with high thermal conductivity and a preparation method thereof and aims at solving the problem that traditional thermal conductive silicone grease is low in thermal conductivity. The composite silicone grease with high thermal conductivity comprises 0.5%-5% of graphene and 95%-99.5% of thermal conductive silicone grease according to the mass percent. The preparation method comprises the steps of: step 1, weighing the materials; step 2, pretreating the graphene; and step 3, preparing the composite silicone grease with high thermal conductivity. The thermal conductivity of the composite silicone grease with high thermal conductivity prepared by the method is increased by 7%-60% than that of original silicone grease. The composite silicone grease with high thermal conductivity prepared by the method has wide application prospect in CPUs (central processing units) of computers, solar panels and heat-sink devices of other high-power electrical ...

Preparation method of graphene

The invention provides a preparation method of graphene, relating to the technical field of new material preparation and aiming to solve the problems that existing mechanical methods are low in yields, the lamella thickness is not easy to control, the properties are not stable, graphene prepared by chemical methods has poor properties, both mechanical and chemical methods adopt ultrasonic treatment, thus causing long production cycle, and prepared graphene has poor integrity. The method comprises the following steps: firstly, ball-milling graphite with high thermal conductivity; secondly, pickling the powder obtained after ball-milling and preparing expanded graphite; thirdly, oxidizing expanded graphite and stripping the lamella by utilizing temperature change, thus preparing graphene oxide; and fourthly, reducing graphene oxide with hydrogen hydrazine and finally carrying out drying, thus preparing graphene powder. The preparation method has the advantages that graphene prepared by the ...

Three-dimensional net structure Si-Al composite material and preparation method thereof

Si-Al compound material with three-dimensional net structure and the preparation method of it. The aim of this patent is to resolve the problem that when the Si grain is used to enhance Al group material, the heat-translating ability will decreased and the coefficient of heat expansion is high for the interface heat resistance. The grains of the Si reinforcing body of the three-dimensional net structure compound material of this patent join together to form three-dimensional net structure. Firstly, the compound material will be put into mould according to the preparation method of this patent. The mould will be forced by the head pressure up and lower of the press machine. And the press will be retained. The mould will be heated by electric oven, and then to demould, the preparation will be finished. The character of the three-dimensional net structure Si-Al compound material is as following: The siliceous range of it is wide, the density of it is low, the tightness is high and the expansion ...

Method for preparing high-strength plasticity aluminum-base composite material by employing TiB2 particles

Composite high-strength lead-free brazing filler metal for electronic packaging and preparation method thereof

The invention discloses composite high-strength lead-free brazing filler metal for electronic packaging and a preparation method thereof. The composite high-strength lead-free brazing filler metal comprises graphene and lead-free brazing filler metal. The preparation method includes the steps of firstly, dispersing the graphene and lead-free brazing filler metal powder in ethyl alcohol under the ultrasonic action, and subjecting the ethyl alcohol solution with the graphene and the lead-free brazing filler metal powder to ball milling mixing; secondly, performing vacuum drying to obtain mixed powder of the graphene and the lead-free brazing filler metal powder; thirdly, placing the mixed powder of the graphene and the lead-free brazing filler metal powder into a mould to be squeezed to form a precast block, placing the precast block along with the mould in a vacuum furnace to sinter for 3 hours at the temperature of 180 DEG C, and demoulding to obtain the composite high-strength lead-free ...

Preparation method of high-energy-absorption layered sandwich protection structure

The invention discloses a preparation method of a high-energy-absorption layered sandwich protection structure, and relates to a preparation method of an energy-absorption protection structure. The problem that an existing anti-impact protection structure is poor in energy absorption effect is solved. The method comprises the following steps: weighing hollow balls and the balance of aluminum ingots; screening and drying the hollow spheres, then placing the hollow spheres in a steel mold, compacting, and preheating to obtain a preheated prefabricated body; infiltrating the preheated prefabricated body into molten aluminum on a press machine to obtain a hollow sphere porous aluminum-based composite material core plate; and the face plate, the core plate and the back plate are stacked and glued through an epoxy resin adhesive, and finally drying is conducted. According to the protection structure, the porous composite material with higher strength and higher energy absorption capacity is adopted ...

Method for preparing rear earth corrosion resistant film on metal base composite surface

A method for preparing rare earth anticorrosive film on the surface of a metal-based compound material relates to a preparation method of anticorrosive film on the surface of the metal-based compoundmaterial. The present invention solves the problems of uneven anticorrosive film on the surface of the metal-based compound material prepared by the prior method. The rare earth anticorrosive film onthe surface of the metal-based compound material of the invention is prepared according to the following procedures: 1. the metal-based compound material is pretreated; 2. sol is prepared and immersed; 3. the sol is decomposed and polycondensed to achieve the rare earth anticorrosive film on the surface of the metal-based compound material. The film prepared by the invention is uniform; the rare earth films are distributed both on the reinforced body and the substrate of the metal-based compound material.

Low-cost aluminum-based composite shielding material and preparation method thereof

The invention relates to a low-cost aluminum-based composite shielding material and a preparation method thereof, in particular to a low-cost aluminum-based composite shielding material and a preparation method thereof. The problems that an existing nuclear shielding material is single in shielding performance, poor in mechanical property, high in cost and incapable of achieving structure and function integration are solved. The tungsten boride-gadolinium oxide-aluminum-containing composite material is prepared from 10%-20% of tungsten boride, 0.25%-1% of gadolinium oxide and 79%-89.75% The method comprises the following steps: 1, uniformly mixing two kinds of powder by a mechanical ball milling method; 2, filling the mixed powder into a mold; 3, performing cold pressing to prepare a prefabricated body; 4, hot pressed sintering; 5, demolding; 6, wrapping the sintered block with an aluminum alloy sheath; and 7, carrying out heat preservation and hot pressing to deform the material. The composite ...

Silicon nitride ceramic particles enhancement aluminum-base composite material and preparing method thereof

The invention discloses a silicon nitride ceramic particle reinforced aluminum matrix composite material and a manufacture method thereof, and relates to an aluminum matrix composite material and a manufacture method thereof. The invention solves problems that the prior art uses complicated technology for preparing the silicon nitride reinforced aluminum matrix composite material with high cost and requirement on equipment, less available aluminum alloy categories, requirement of sintering agent, and poor product integral performance. The silicon nitride ceramic particles reinforced aluminum matrix composite material is made from silicon nitride ceramic powder and aluminum or aluminum alloy. The manufacture method is as follows: a. filling the silicon nitride ceramic powder into a die set, obtaining a prefabricated block; b. heating up the aluminum or aluminum alloy to be fused, then casting into the preheated die set, applying force on the die set so as to cool down the die set naturally ...

No damage test device of permanent magnet magnetic field intensity

The invention relates to a no damage test device of permanent magnet magnetic field intensity, and relates to the field of the time stability test of the magnetic performance of a permanent magnet. The test device provided by the invention solves the problem that the existing permanent magnet magnetic field intensity test device has poor test result precision, is limited by the volume and the shape of a tested permanent magnet, and cannot ensure the test magnetic field intensity range and the test precision at the same time. The test device comprises an induction coil, the permanent magnet, a telescopic mechanism, a motor, a permanent magnet carrier, a signal detection device and a temperature control box. The induction coil and the permanent magnet are located in the temperature control box. The induction coil is wound into a circular cylinder. The permanent magnet is arranged in the permanent magnet carrier. One end of the telescopic mechanism is connected with one end of the permanent ...

Method for preparing diamond/metal composite material at high flux

The invention relates to a method for preparing a diamond/metal composite material, in particular to a method for preparing a diamond/metal composite material in a high-throughput mode. The problem that the research efficiency and the material preparation efficiency of the research and preparation process of an existing diamond/metal composite material are low is solved. The method comprises the steps of raw material preparation, diamond particle high-flux pretreatment, mold filling, preheating and vacuum degassing and air pressure infiltration. Crucibles made of different wave-transparent materials are adopted in the process of pretreating the diamond particles through microwaves, different heating temperatures can be obtained in single treatment, and high-flux pretreatment of the diamond particles is achieved; diamond particles with different particle sizes, different coating types and different coating thicknesses can be added into the near-net forming mold in the preform structure, ...

Method for preparing Ti2AlN/TiAl compound material by regulating and controlling components accurately

The invention discloses a method for preparing a Ti2AlN/TiAl compound material by regulating and controlling components accurately, and relates to the method for preparing a compound material. The method for preparing the Ti2AlN/TiAl compound material by regulating and controlling the components accurately solves the problems that the prior method for preparing the Ti2AlN/TiAl compound material is easy to introduce impurities and is difficult to control the volume fraction of the Ti2AlN/TiAl on large scale. The method comprises the following steps: firstly, putting Ti powder, Al powder and TiN powder into a liquid dispersant according to certain percentage, ball-milling the mixture, and drying the mixture to obtain mixed powder; and secondly, putting the mixed powder into a graphite mold,preserving heat and pressure of the mixed powder at 700 DEG C, 900 DEG C and 1,300 DEG C respectively, and cooling the mixed powder to a room temperature in a furnace so as to obtain the Ti2AlN/TiAl compound ...

High-interface-strength Cf/Mg composite material and preparation method thereof

The invention discloses a high-interface-strength Cf/Mg composite material and a preparation method thereof, belongs to the field of light structural materials and particularly relates to a high-interface-strength Cf/Mg composite material and a preparation method thereof. The high-interface-strength Cf/Mg composite material disclosed by the invention is used for solving the problem that an existing Cf/Mg composite material is low in interface bonding strength. The high-interface-strength Cf/Mg composite material is prepared from carbon fibers and magnesium-yttrium alloy, wherein the magnesium-yttrium alloy is prepared from pure yttrium alloy and pure magnesium. The preparation method comprises the following steps: (1) preparing a carbon fiber reinforcement prefabricated member by using a fiber winding machine; (2) smelting pure magnesium and pure yttrium to obtain a magnesium-yttrium alloy melt solution; (3) pressing the carbon fiber reinforcement prefabricated member into a cavity of a ...

Ablation resistance composite material and preparation method thereof

The invention discloses an ablation resistance composite material and a preparation method thereof, and relates to an ablation resistance composite material and a preparation method thereof. A purpose of the present invention is to solve the technical problem of easy oxidation of the existing C/C composite material under a high temperature condition. The ablation resistance composite material is prepared from 50-90% by volume of a C/C composite material and 10-50% by volume of an impregnating agent. The preparation method comprises: 1, weighing raw materials; 2, placing an impregnating agent into a graphite mold, placing into a high temperature furnace, carrying out vacuumizing heating, and pressurizing; and 3, placing the C/C composite material into the graphite mold by using a filler rod, carrying out thermal insulation, and cooling to a room temperature to obtain the finished product. According to the present invention, during the ablation process, the molten SiO2 layer with good anti-oxidation ...

Method for prepn. ceramic crystal whisker strengthened metallic compound-base composite material

A compound material based on ceramic whisker strengthened (toughened) intermetallic compound is made up through mixing the whisker with high-smelting-point metal powder in intermetallic compound, by the reaction of intermetallic compound to create thermodynamic condition, penetrating the low-smelting-point metal in intermetallic compound into the mixture in simple pressure casting apparatus by external pressure, and reaction to generate intermetallic compound containing a certain quantity of whiskers.

Method for prepn. Ceramic srystal whisker strengthened mitallic compound-base composite material

Preparation method of multiphase interface high-thermal-conductivity diamond/aluminum composite material

The invention relates to a preparation method of a diamond/aluminum composite material, in particular to a preparation method of a multiphase interface high-thermal-conductivity diamond/aluminum composite material. The problems that in a diamond/aluminum composite material, wettability of diamond and an aluminum matrix is poor, and heat conductivity is low are solved. The method comprises the following steps: weighing diamond particles and aluminum blocks; mixing nitrate with the diamond particles, and carrying out etching treatment on the surfaces of the diamond particles by utilizing molten nitrate; a metal coating is plated on the surface of diamond, high-temperature short-time sintering is carried out by adopting a spark plasma sintering method, and the diamond/aluminum composite material prepared by utilizing an air pressure infiltration method has the characteristic of a multi-phase interface and shows excellent heat-conducting property; according to the method, the molten nitrate ...

Method for preparing Ti2AlN/TiAl compound material by regulating and controlling components accurately

The invention discloses a method for preparing a Ti2AlN/TiAl compound material by regulating and controlling components accurately, and relates to the method for preparing a compound material. The method for preparing the Ti2AlN/TiAl compound material by regulating and controlling the components accurately solves the problems that the prior method for preparing the Ti2AlN/TiAl compound material is easy to introduce impurities and is difficult to control the volume fraction of the Ti2AlN/TiAl on large scale. The method comprises the following steps: firstly, putting Ti powder, Al powder and TiN powder into a liquid dispersant according to certain percentage, ball-milling the mixture, and drying the mixture to obtain mixed powder; and secondly, putting the mixed powder into a graphite mold, preserving heat and pressure of the mixed powder at 700 DEG C, 900 DEG C and 1,300 DEG C respectively, and cooling the mixed powder to a room temperature in a furnace so as to obtain the Ti2AlN/TiAl compound ...

Preparation method of high-Zr-content Ti50.5-xNi49.5Zrx ternary alloy powder

A preparation method of a high-Zr-content Ti50.5-xNi49.5Zrx ternary alloy powder relates preparation methods of alloy powder. The preparation method of the high-Zr-content Ti50.5-xNi49.5Zrx ternary alloy powder mainly solves the technical problems of low efficiency, complex process and low Zr content of existing TiNiZr alloy preparation methods. The method comprises, firstly, weighing out Ti powder, Ni powder and Ti10Zr90 alloy powder; secondly, filling the raw materials into a ball milling tank; thirdly, performing ball milling. The preparation method of the high-Zr-content Ti50.5-xNi49.5Zrx ternary alloy powder can precisely control and stabilize composition and can prepare materials with specific component content, particularly the high-Zr-content Ti50.5-xNi49.5Zrx ternary alloy powder.

Heat treatment method of 9Cr180Mo steel valve bush part

The invention discloses a heat treatment method of a 9Cr18Mo steel valve bush part, relates to a heat treatment method and solves the problems that the 9Cr18Mo steel valve bush part obtained by the heat treatment method has large axial size change and the product subjected to the heat treatment has low qualified rate. The heat treatment method comprises the following steps of stress relieving annealing, vacuum annealing, vacuum quenching, austenite stabilization, cold treatment and drawing temper. The axial size change rate of the 9Cr18Mo steel valve bush part is less than +/-15*10<-5> which is greatly reduced in comparison with the axial size change rate (+/-15*10<-5>+/-100*10<-5>) of the 9Cr18Mo steel valve bush part obtained by the traditional heat treatment method.

Extremely low-expansion and high-modulus tensile cable and manufacturing method thereof

The invention discloses an extremely low-expansion and high-modulus tensile cable and a manufacturing method thereof. The tensile cable is manufactured by carbon fibers and an adhesive, wherein the carbon fibers adopt the carbon fibers of T series, specifically, T300, T700 or T1000, M series, specifically, M35 or M40 and P series, specifically, P100; and the adhesive adopts SY-53M glue. The manufacturing method for the tensile cable comprises the following steps of: 1, glue preparation; 2, coating; 3, impregnation; 4, surface treatment and uniform regulation; 5, knitting; 6, the surface treatment and uniform regulation; 7, pre-tensioning; and 8, curing, wherein the tensile cable finally has strength of more than 1,000MPa, elastic modulus of more than 200GPa, longitudinal expansion coefficient of less than 1*10<-6>/DEG C, temperature range of +/-120 DEG C, and certain flexibility and abrasive resistance, can be adapted to the complex environments of huge temperature difference, high intensity ...

Embedding damping pulp and method for preparing same

Non-destructive test method and device for average magnetic field intensity of permanent magnet

The invention discloses a non-destructive test method and device for the average magnetic field intensity of a permanent magnet and relates to the field of time stability testing of permanent magnet magnetic property. The problems that an existing test device for the magnetic field intensity of a permanent magnet is poor in precision, the size and shape of the tested permanent magnet are limited and tested, and the magnetic field intensity range and test precision cannot be ensured at the same time are solved. The test method comprises the steps that the shape of a wound induction coil is determined; the positions of the induction coil, the permanent magnet and a magnetizer are determined, wherein the magnetizer is located in a magnetic force line of the induction coil, and the induction coil is located between the magnetic force lines of the magnetizer and the permanent magnet; test environment temperature is adjusted to be a preset value; the permanent magnet repeatedly does uniform motion ...

Preparation method of large-size special-shaped structure diamond/aluminum composite material

The invention discloses a preparation method of a large-size special-shaped structure diamond/aluminum composite material, and relates to a preparation method of a composite material. The problems that the interface bonding of the diamond/aluminum composite material is poor, the surface precision of the large-size and complex-shape diamond/aluminum composite material is low, and the thermal performance uniformity is poor are solved. The surfaces of the diamond particles are plated with the metal coatings and subjected to high-temperature treatment, the interface of diamond and aluminum is improved, and the uniformity of the thermal performance of the composite material is improved. By designing a mold, near-net forming preparation of the large-size and complex-shape diamond/aluminum composite material is achieved, the outer surface of the prepared composite material component is made of diamond powder with the small particle size, the interior of the prepared composite material component ...

Method for chemically plating hollow microsphere surface with amorphous Ni-Fe-P

The invention provides a method for chemically plating a hollow microsphere surface with amorphous Ni-Fe-P, relating to a method for chemically plating the hollow microsphere surface. The method comprises the following steps: I. washing; II sensitizing with SnCl2; III. activating with PdCl2; IV. chemical plating. The hollow microsphere surface can be successfully and completely coated with Ni-Fe-P by adopting the special formula of a plating solution for chemical plating with Ni-Fe-P and a proper pretreatment process, thus obtaining a uniform and continuous coating. The coating comprises nickel, phosphorus and the balance of iron and belongs to low-phosphorus chemical plating, wherein the mass percent of nickel is controllable between 80% and 88%, and the mass percent of phosphorus is controllable between 3% and 6%. The method is applied in the field of hollow microsphere surface chemical plating.

Preparation method of phase-change composite material with high heat conductivity and high density

The invention discloses a preparation method of a phase-change composite material with high heat conductivity and high density, relates to a preparation method of a phase-change composite material with high heat conductivity and high density, and aims at solving the problems that a single phase-change material is relatively low in heat conductivity, and a composite phase-change material employing expanded graphite as a heat-conducting strengthening phase is low in density. The preparation method comprises the following steps: 1, pretreatment of a reinforcement body; 2, pretreatment of a matrix material; 3, two-phase mixing; 4, ultrasonic oscillation; and 5, consolidation and formation. With erythritol as a phase-change material, and expanded graphite as the heat-conducting strengthening phase, the heat conductivity of the phase-change material can be greatly improved; and the heat exchange efficiency is improved. Two-phase blending is promoted by an ultrasonic method; a graphite skeleton ...

Functional gradient armor structure resistant to 14.5 mm armor-piercing bullet

The invention relates to a functionally gradient armor structure, in particular to a functionally gradient armor structure resistant to 14.5 mm armor-piercing bullets. The problems that a traditional ceramic/metal or ceramic/fiber composite armor structure is large in surface density and too large in thickness, and the elasticity resistance is difficult to further improve are solved. The armor structure comprises a ceramic panel, a gradient B4C/Al composite material and a packaging material, and the ceramic content of the whole structure is in 100-50% gradient change from the panel to a back plate. The thickness of the ceramic panel in the armor structure is 14-18 mm; the gradient B4C/Al is of a multi-layer structure, and the overall thickness is 12-15 mm; the packaging material comprises a crack arrest layer, an adhesive and a fiber layer. The invention is applied to the field of armor protection.

Photocathode protection controllable modification method for B4C ceramic reinforcement particles

The invention discloses a photocathode protection controllable modification method for B4C ceramic reinforcement particles, and relates to a B4C particle modification method. The problems that an existing preparation method of a TiO2 transition layer in a composite material is complex in process, harsh in condition and uncontrollable in synthesis are solved. According to the preparation method, a titanate hydrolysis method is utilized, a titanate solution and B4C powder are fully mixed by using a stirrer, the surface of the B4C powder is uniformly coated with a layer of titanium source, and TiO2 particles which are uniformly distributed can be generated on the surface of the B4C powder after titanate hydrolysis. The method has the advantages of simple equipment, controllable result, high cost performance, high yield, safety, no environmental pollution and the like. The prepared modified B4C powder can be used for preparing a photocathode protection composite material, and TiO2 nanoparticles ...

Explosion-resistant and impact-resistant multi-layer structure plate and integrated preparation method thereof

The invention relates to an anti-knock and anti-impact multi-layer structural plate and an integrated preparation method thereof, in particular to an anti-knock and anti-impact multi-layer structural plate and an integrated preparation method thereof. The invention aims to solve the problems of single function, poor impact resistance and weak interface bonding of an anti-explosion and anti-impact structure of the traditional porous energy-absorbing material. The composite material is composed of a medium-high volume fraction B4C/Al composite material, a hollow microsphere/Al composite material and a fiber-reinforced resin-based composite material. The method comprises the following steps: 1, paving B4C powder, vibrating and pressurizing; 2, paving hollow microspheres on the B4C/Al preform, and pressurizing; thirdly, molten aluminum is melted, the molten aluminum is pressed into the prefabricated body, pressure maintaining is conducted, and demolding is conducted; and fourthly, the fiber ...

SiC/Cu composite materrial and preparation material

A SIC/Cu composite material is composed of SiC grains and Cu materials in which, SiC grains account for 50-75vol%, Cu material makes up of 25-50vol%. The invented preparation method includes: 1. filling, filling SiC grains into the cavity of a mold to be pressed into a frabricated block, 2. pre-heating: pre-heating the mold containing SiC grains to 900deg.C-1100deg.C and heating the Cu to be smelted 3. carting the melted Cu into the mold, 4. pressing and immersing: applying pressure by a press to immerse the Cu melt into the slots among SiC grains, 5. keeping pressure and cooling down 6. stripping and taking out the ingot.

Heat treatment method of 9Cr180Mo steel valve bush part

The invention discloses a heat treatment method of a 9Cr180Mo steel valve bush part, relates to a heat treatment method and solves the problems that the 9Cr180Mo steel valve bush part obtained by the heat treatment method has large axial size change and the product subjected to the heat treatment has low qualified rate. The heat treatment method comprises the following steps of stress relieving annealing, vacuum annealing, vacuum quenching, austenite stabilization, cold treatment and drawing temper. The axial size change rate of the 9Cr180Mo steel valve bush part is less than +/-15*10<-5> which is greatly reduced in comparison with the axial size change rate (+/-15*10<-5>+/-100*10<-5>) of the 9Cr180Mo steel valve bush part obtained by the traditional heat treatment method.

Thermal expansion sample support capable of improving measurement stability of horizontal thermal dilatometer and suitable for various shapes and application of thermal expansion sample support

The invention relates to a thermal expansion sample support and application, in particular to a thermal expansion sample support capable of improving measurement stability of a horizontal thermal dilatometer and suitable for various shapes and application. The problem that the accuracy of test data of an existing horizontal thermal dilatometer is poor is solved. The sample bracket consists of two sample racks and a support frame, the two sample racks are hung below the support frame; and the sample rack is connected with the support frame through a soft rope. The thermal expansion testing method comprises the following steps: inserting a to-be-tested sample into the open pore of one sample rack, and inserting a standard sample into the open pore of the other sample rack; the supporting frame is erected on an opening of a tubular sample holder of the horizontal thermal dilatometer, thrust is applied to the ejector rod, the to-be-tested sample and the standard sample to ensure close contact ...

Reinforcement method for continuous filament reinforced metallic matrix composite

The invention discloses a reinforcement method of a continuous fiber-reinforced metal matrix composite, relates to the fiber-reinforced metal matrix composite, and aims at solving the problems that the rigidity and the strength character of a structural piece of the fiber-reinforced metal matrix composite are low along the thickness direction, the strength of in-plane shear and interlaminar shear is low, the impact ductility is low, and delamination is easy to occur. The reinforcement method is realized according to the steps as follows: after a fiber prefabricated part (2) is prepared, a wire (1) is added in the fiber prefabricated part (2), the fiber prefabricated part (2) and a composite material matrix (3) are processed through molten metal infiltration by heating, and the reinforcement to the continuous fiber-reinforced metal matrix composite is completed after cooling. Because the wire originally has high strength and high toughness and has stronger binding capacity with the matrix ...

Preparation method for coating carbon fiber surface with SiC nanowire

The invention discloses a preparation method for coating a carbon fiber surface with an SiC nanowire, relates to a method for preparing a SiC nanowire and aims at solving the problems that a conventional method for preparing a SiC nanowire is high in cost while the SiC nanowire is low in purity, and a preparation method for coating a carbon fiber surface with a SiC nanowire does not exist in the prior art. The method comprises the following steps: 1, mixing; 2, performing ball-milling; 3, performing acid pickling; 4, washing; 5, performing ultrasonic dispersion and carbon fiber treatment; and 6, drying and performing vacuum furnace treatment, thereby obtaining the SiC nanowire coating the carbon fiber surface. The prepared SiC nanowire coating the carbon fiber surface has the diameter of 10nm-50nm and can reach the length of 100 microns or below, the process is simple, a catalyst is not added in the reaction process, the method is low in cost, and the SiC nanowire is high in conversion ...

Method for severe plastic deformation of metal-based composite material reinforced by using granules with high volume fraction

The invention provides a method for severe plastic deformation of a metal-based composite material by using granules with high volume fraction, which relates to a method for severe plastic deformation of a composite material. The method provided by the invention is used for solving the problems that the plasticity of the metal matrix composite material reinforced by granules with high volume fraction is very bad so as not to achieve severe plastic deformation and the prior art can not ensure the desnsification of the composite material. The method provided by the invention comprises the following steps: 1, processing parts and raw materials; 2, preparing before heating; 3, heating and maintaining the temperature; 4, pressurization deforming; and 5, taking a material. By adopting the method, a blank can generate large plastic deformation under a constraint condition, after being deformed, the blank of the composite material can be in a simple shape and is densified at the same, in order ...

Self-lubricating aluminum-based composite material and method for preparing same

The invention provides a self lubrication aluminum based composite material and a preparation method thereof, relating to an aluminum based composite material and a preparation method thereof. The invention solves the problems of high requirement on equipment, high cost, poor material performance and difficult second shaping and mechanical processing of materials in the synthesis of the prior self lubrication aluminum based composite material. The self lubrication aluminum based composite material is prepared from titanium diboride reinforced particles, aluminum particles or aluminum alloy particles, boron nitride particles and matrix aluminum alloy. The preparation method comprises the following steps: 1. raw materials are weighted according to the volume ratio; 2. the materials except for aluminum alloy are subjected to mixing and preliminary shaping to obtain the prefabricated part, and the prefabricated part is put in a mould and heated; 3. the aluminum alloy is heated until the aluminum ...

In-situ preparation method of diamond and silicon carbide mixed reinforced high-thermal-conductivity and high-strength aluminum matrix composite

The invention discloses an in-situ preparation method of a diamond and silicon carbide mixed reinforced high-thermal-conductivity and high-strength aluminum-based composite material, and relates to a preparation method of a high-strength diamond/aluminum composite material. The problems that a diamond/aluminum composite material is poor in interface bonding and has brittleness and an interface product Al4C3 easy to hydrolyze are solved. The method comprises the following steps: weighing diamond and an aluminum alloy block, and carrying out etching treatment on the diamond by using hydrogen plasma; the obtained diamond particles are placed in a mold and compacted through vibration, and a prefabricated body is obtained; and the prefabricated body is hoisted in an air pressure infiltration furnace for air pressure infiltration, demolding is conducted, the diamond/aluminum composite material is obtained, and annealing treatment is conducted. According to the method, the surfaces of the diamond ...

Method for preparing graphene/aluminum-based composite material with assistance of fatty acid compound containing carboxyl and carbon-carbon double bonds

The invention discloses a method for preparing a graphene/aluminum-based composite material under the assistance of a fatty acid compound containing carboxyl and carbon-carbon double bonds, and relates to a preparation method of the graphene/aluminum-based composite material. The problem that a defect repairing method of graphene is complex is solved. The method comprises the following steps: weighing graphene, a fatty acid compound containing carboxyl and carbon-carbon double bonds and aluminum metal powder as raw materials; the preparation method comprises the following steps: weighing an aluminum alloy block, dispersing by an ultrasonic-assisted graphene dispersing agent, carrying out ball-milling dispersion on a mixture of graphene and a fatty acid compound containing carboxyl and carbon-carbon double bonds and aluminum metal powder, carrying out preform forming, carrying out aluminum metal infiltration and graphene defect regulation, carrying out severe plastic deformation treatment ...

Preparation method of graphene-silicon nitride synergistically reinforced aluminum-based composite material

The invention discloses a preparation method of a graphene-silicon nitride synergistically reinforced aluminum-based composite material, and relates to a preparation method of an aluminum-based composite material. The problems that the graphene/aluminum-based composite material is poor in interface bonding strength and prone to interface reaction are solved. The silicon-nitrogen precursor is added to serve as a precursor of in-situ synthesis silicon nitride, compared with direct addition of silicon nitride particles, the silicon-nitrogen precursor is liquid at normal temperature and more easily and uniformly wraps the surfaces of graphene and aluminum metal powder in the dispersion process, nano-scale silicon nitride particles are in-situ synthesis at high temperature, and the in-situ synthesis performance of the graphene and the aluminum metal powder is improved. Graphene-aluminum interface bonding can be more stably improved, and the problem of carbon-aluminum interface reaction in the ...

Preparation method for Al2O3 hollow sphere/aluminum porous composite material

The invention provides a preparation method for an Al2O3 hollow sphere/aluminum porous composite material, relates to a preparation method for an aluminum-based porous composite material, which solves the problems that the strength of a traditional foam aluminum material is low, the process conditions are harsh and the cost is high in an existing preparation method. The preparation method 1 comprises the following steps: step 1. filling an Al2O3 hollow sphere; step 2. pre-heating; step 3. pouring; step 4. pressurizing and immersing; and step 5. maintaining pressure, cooling and carrying out de-molding to obtain the Al2O3 hollow sphere/aluminum porous composite material. The preparation method 2 comprises the following steps: step 1. mixing the Al2O3 hollow spheres with different grain diameters and filling; step 2. pre-heating; step 3. pouring; step 4. pressurizing and immersing; and step 5. maintaining pressure, cooling and de-molding to obtain the Al2O3 hollow sphere/aluminum porous composite ...

Fibre reinforced intermetallic compound composite material as well as preparation and forming method thereof

The invention relates to a fiber reinforced intermetallic compound material and the preparation and forming method, in particular to a continuous fiber reinforced intermetallic compound composite material and the preparation and forming method, which overcomes the defects of complex processing equipment, high cost, high content of impurities of the fiber reinforced intermetallic compound composite materials in the prior art, and solves the problem that the long fiber reinforced intermetallic compound composite materials can only be made into sheet, disc and other products with simple shape and can not be used for practical application. The composite material comprises fiber reinforcer and titanium-aluminium intermetallic compound matrix, the method is as follows: design and processing of forming dies; preparation of titanium powder sizing agent; preparation of pre-impregnated fiber; preparation of prefabricated members; infiltration reaction of aluminum and aluminum alloy; uniformization ...

Heat treatment method for improving dimensional stability of metal matrix in long-term temperature fluctuation environment

The invention discloses a heat treatment method for improving the dimensional stability of a metal matrix in a long-term temperature fluctuation environment, and relates to a heat treatment method. In order to solve the problem that an existing metal material is poor in dimensional stability, the invention provides the metal material which can release residual internal stress in the metal material and stabilize dislocation, grain boundary and other defect structures in the metal material at the same time, and the metal material which also has high structure stability and stress stability under the temperature fluctuation condition is obtained. The size stability of a metal material for a precise instrument structure material in the service process is improved. The whole treatment process is carried out in a furnace body with protective gas, so that the phenomena of oxidative deterioration and the like of the material in a high-temperature section in the heat treatment process can be avoided ...

High strength foam composite aluminum materials and preparation thereof

A foam-type high-strength light-weight composite aluminium material features it contains the closed micropores in it, and is prepared through loading hollow bodies in mould, smelting aluminium, heating mould to 450-550 deg.C, pouring molten aluminium in the mould, applying pressure to penetrate the molten aluminium in the gaps between hollow bodies, pressure cooling and demoulding.

Method for preparing rear earth corrosion resistant film on metal matrix composite surface

A method for preparing rare earth anticorrosive film on the surface of a metal-based compound material relates to a preparation method of anticorrosive film on the surface of the metal-based compound material. The present invention solves the problems of uneven anticorrosive film on the surface of the metal-based compound material prepared by the prior method. The rare earth anticorrosive film on the surface of the metal-based compound material of the invention is prepared according to the following procedures: 1. the metal-based compound material is pretreated; 2. sol is prepared and immersed; 3. the sol is decomposed and polycondensed to achieve the rare earth anticorrosive film on the surface of the metal-based compound material. The film prepared by the invention is uniform; the rare earth films are distributed both on the reinforced body and the substrate of the metal-based compound material.

Three-dimensional network structure Si-Al composite material preparation method

Method for preparing diamond/aluminum composite material through high-flux near-net forming

The invention discloses a method for preparing a diamond/aluminum composite material through high-flux near-net forming, and relates to a preparation method of a diamond-reinforced aluminum-based composite material. The invention aims to solve the problem of low efficiency caused by much time consumption when the influence factors of the thermal conductivity and the mechanical property of the diamond/aluminum composite material are researched. The method comprises the following steps: filling diamond particles into a near-net forming die, and stacking the near-net forming die into an array channel of a spark plasma sintering die for spark plasma sintering; then, the diamond particles are transferred into a near-net forming mold made of graphite to be assembled into a prefabricated body, and air pressure infiltration is conducted; according to the device and the method, high-flux preparation of a heat conductivity sample, a three-point bending sample and a thermal expansion sample of the ...

Preparation method of diamond/metal composite material with high thermal conductivity

The invention relates to a preparation method of a composite material, in particular to a preparation method of a high-thermal-conductivity diamond/metal composite material. The problem that an existing diamond/metal composite material is poor in heat conductivity is solved. The method comprises the steps that a metal coating is prepared on the surfaces of diamond particles, the diamond particles have two particle sizes, the diamond particles with the two particle sizes are alternately arranged in a prefabricated body mold in a layered mode and compacted to obtain a prefabricated body, high-temperature short-time sintering treatment is carried out, and the surface metal coating reacts with diamond to form carbide; and forming a three-dimensional connecting structure among the diamond particles, and carrying out air pressure infiltration. The preparation of the high-thermal-conductivity diamond/metal composite material is realized from multiple perspectives of forming a diamond three-dimensional ...

Ultrahigh heat-conduction diamond/aluminum composite material and preparation method of ultrahigh heat-conduction diamond/aluminum composite material

The invention relates to a composite material and a preparation method of the composite material, in particular to an ultrahigh heat-conduction diamond/aluminum composite material and a preparation method of the ultrahigh heat-conduction diamond/aluminum composite material. In order to solve the technical problems that a diamond/aluminum composite material prepared with the existing method is low in heat conductivity and poor in interface combination strength, the ultrahigh heat-conduction diamond/aluminum composite material is composed of a reinforcement body and matrix alloy. The preparation method includes the steps that monocrystal diamond particles are contained in a cavity of a graphite die for preheating, and melted aluminum or aluminum alloy is poured to the interior of the graphite die; pressure impregnation is carried out, cooling is carried out, die releasing is carried out, and then the ultrahigh heat-conduction diamond/aluminum composite material is obtained. The diamond/aluminum ...

Boron carbide-based composite material and preparation method thereof

The invention provides a boron carbide-base composite material and a preparation method thereof. The preparation method solves the problems of the prior method for preparing the boron carbide-base composite material that the process is complex; the cost is high; the hardness of the material falls down and the fracture toughness is poor when the sintering temperature falls down. The boron carbide-base composite material is prepared with boron carbide powder, the aluminium powder or the aluminium alloy powder. The preparation method comprises the steps of 1. weighing raw materials and mixing the powdered boron carbide with the aluminium powder, thus getting powder; 2. mixing the powder with an agglomerant, granulating the powder and the agglomerant, pressing and moulding the granules, thus getting biscuit; 3. drying and sintering the biscuit, thus getting the boron carbide-base composite material. The process is simple; the cost is low; the sintering temperature is reduced; the hardness and ...

High strength foam composite aluminum materials and preparation thereof

Preparation method of graphene aluminum-based composite material

The invention discloses a preparation method of a graphene aluminum-based composite material. The invention relates to the technical field of preparation of new materials, and particularly relates to a preparation method of a graphene aluminum-based composite material, aiming at solving the problems that an existing graphene aluminum-based composite material is low in strength and the volume percentage of graphene in the composite material is low. The method comprises the following steps: I. preparing aluminum metal powder; II. preparing a composite powder body; III. preparing preforms; IV. smelting molten aluminum; and V. infiltrating the molten aluminum into clearances of the preforms by utilizing pressure infiltration, maintaining pressure, conducting mold cooling, and demolding to obtain the graphene aluminum-based composite material. The graphene aluminum-based composite material prepared by adopting the preparation method is uniform in components, high in density, lower in cost, and ...

Method for preparing metal-matrix composite by vacuum pressure infiltration

The invention discloses a method for preparing metal matrix composite by vacuum pressure infiltration, relating to a method for preparing metal matrix composite. The method aims at solving the problems of low working pressure, expensive equipment investment for one time and complicated process existing in the current vacuum pressure infiltration method. The method of the invention comprises the steps that: the degree of vacuum in a vacuum container reaches 1Pa to 10 <-3> Pa; the temperature of the vacuum container increases to 5 DEG C to 200 DEG C higher than the melting point of a metal alloyby heating and is kept constant for 10 to 90 minutes; the pressure in a mould is 0.1MPa to 200MPa and is kept constant for 20 to 60 minutes. The method of the invention can prepare the metal matrix composite provided with the performance of excessively large critical infiltration pressure that the current vacuum pressure infiltration method can not prepare. Compared with the traditional method, the ...

Method for preparing one dimension SiC Nano fiber

Method for plating nickel coating on electrosparking surface of electronic packaging aluminum-base composite material

The invention provides a method for plating a nickel coating on the electrosparking surface of an electronic packaging aluminum-base composite material, relating to a method for chemically plating a nickel coating on the electrosparking surface of an aluminum-base composite material. The invention aims to solve the problems that the processing procedure and cost are increased and the binding force between the coating and matrix is weak since the electrosparking surface of the existing electronic packaging aluminum-base composite material needs to be ground and milled after electrosparking. The method comprises the following steps: 1. cleaning; 2. acid etching; 3. oil removal; 4. primary zinc soaking; 5. nitric acid removal; 6. secondary zinc soaking; and 7. plating. The method directly plates the Ni-P coating on the electrosparking surface of the electronic packaging aluminum-base composite material, and has the advantages of low cost, simple coating procedure and stable coating technique ...

Method for toughening Ti-Al family intermetallic compound

The invention provides a method for toughening a Ti-Al family intermetallic compound and relates to a method for toughening an intermetallic compound, solving the problems that the existing Ti-Al family intermetallic compound has large friability, complicated preparation technology and high cost, and the performance is reduced as a friability interface product is easily generated on a fiber reinforcement body and a Ti-Al basal body interface caused by utilizing a long fiber to reinforce the intermetallic compound. The method comprises the following steps of: preparing Ti powder or Ti-Al compound powder slurry; manufacturing a prefabricated part; dipping aluminum liquid or aluminum alloy liquid into the prefabricated part by using a pressurization dipping method or a vacuum suction casting method; and heating a casting state composite material under the protection of vacuum or inert atmosphere so as to obtain the toughened Ti-Al family intermetallic compound. The invention has simple technology ...

Electrolytic polishing method suitable for zinc and zinc alloy EBSD sample preparation

The invention discloses an electrolytic polishing method suitable for preparing a zinc and zinc alloy EBSD sample, and relates to an electrolytic polishing method for preparing an EBSD sample. The problems that the reaction rate of zinc and zinc alloy in electrolyte is too high, and corrosion and oxidation are prone to occurring are solved. The method comprises the following steps: grinding and mechanically polishing a to-be-polished surface of a sample; a stainless steel sheet is used as a cathode, a beaker is used as an electrolysis container, electrolyte is poured into the beaker, and the cathode is immersed below the liquid level of the electrolyte; the volume fraction of perchloric acid in the electrolyte is 5%, the volume fraction of methanol is 25-45%, and the balance is n-butyl alcohol; rotating the electrolyte at the temperature of-30 DEG C to-40 DEG C by adopting magnetic stirring; the sample is used as an anode to be placed in an electrolysis container and immersed below the ...

Hollow microsphere/Ni-Fe-P/Cu composite coating and preparation method thereof

The invention provides a hollow microsphere/Ni-Fe-P/Cu composite coating and a preparation method thereof, relating to a hollow microsphere composite coating and a preparation method thereof. The hollow microsphere/Ni-Fe-P/Cu composite coating comprises a matrix hollow microsphere, an amorphous Ni-Fe-P soft magnetic coating and a nano Cu conductive coating from inside to outside. The method comprises the following steps: I. washing; II sensitizing with SnCl2; III. activating with PdCl2; IV. chemical plating of Ni-Fe-P; V. chemical plating of Cu. The hollow microsphere composite coating has light weight, high permeability, high conductivity and multiple interfaces, and thus the hollow microsphere composite coating can be used for preparing electromagnetic shielding coatings with good shielding property, wide frequency range and light weight. Besides, the hollow microsphere composite coating can be also applied in the field of wave absorption and is applied in the field of hollow microsphere ...

Pressure-free impregnation preparation method for Al2O3 particle reinforced aluminum base composite material

Boron carbide-based composite material and preparation method thereof

The invention provides a boron carbide-base composite material and a preparation method thereof. The preparation method solves the problems of the prior method for preparing the boron carbide-base composite material that the process is complex; the cost is high; the hardness of the material falls down and the fracture toughness is poor when the sintering temperature falls down. The boron carbide-base composite material is prepared with boron carbide powder, the aluminium powder or the aluminium alloy powder. The preparation method comprises the steps of 1. weighing raw materials and mixing the powdered boron carbide with the aluminium powder, thus getting powder; 2. mixing the powder with an agglomerant, granulating the powder and the agglomerant, pressing and moulding the granules, thus getting biscuit; 3. drying and sintering the biscuit, thus getting the boron carbide-base composite material. The process is simple; the cost is low; the sintering temperature is reduced; the hardnessand ...

Preparation method of high-thermal conductivity graphene-Sn-Ag composite brazing filler metal

The invention discloses a preparation method of a high-thermal conductivity graphene-Sn-Ag composite brazing filler metal, ad relates to a preparation method of a high-thermal conductivity composite brazing filler metal. The preparation method has the following purposes: the problem of graphene floating and agglomeration in the preparation and application process of the composite brazing filler metal is solved by reducing a greater density difference between graphene and an Sn-Ag brazing filler metal matrix through plating a metal on the graphene; meanwhile, the graphene is dispersed more uniformly in the brazing filler metal matrix; and the reliability of sealing and brazing is improved by improving the heat conductivity of the composite brazing filler metal through adding the graphene. The method comprises the following steps: (1) the metal is plated on the graphene; and (2) the ball milling, the mixing and the medium-temperature smelting are performed for the metal-plated graphene and ...

High-damping composite material

The invention relates to a damping composite material, and particularly relates to a high-damping composite material, which solves the problems of large density and low damping peak value of the existing damping composite material. The high-damping composite material is compounded by TiNi alloy fiber and a base metal, wherein the base material is aluminum, aluminum alloy or magnesium alloy, and the TiNi alloy fiber accounts for 30%-60% the volume of the high-damping composite material. The TiNi alloy fibers of different phase-transition temperatures can be used as enhanceosome for preparing the composite material with high damping property between -100 DEG C and 120 DEG C. The high-damping composite material has low density, and the damping peak value of the high-damping composite material compounded by TiNi alloy fiber with phase-transition temperature of 70 DEG C and 1060 Al can reach 0.04. The high-damping composite material can be used in structures such as supporting platforms of aerospace ...

Method for preparing special alloy thin-walled member

The invention discloses a method for preparing a special alloy thin-walled member, which relates to a method for preparing a thin-walled member and solves the problems of processing difficulty, high cost and poor precision of the conventional method for preparing the alloy thin-walled member by first preparing iron-based or nickel-based special alloy by using a casting or powder metallurgy methodand then machining the iron-based or nickel-based special alloy. The method comprises the following steps of: 1, processing a prefabricated member of the thin-walled member by using a material consisting of main elements in the special alloy; 2, depositing other elements except the main elements contained in the prefabricated member on the surface of the prefabricated member in a plating form; and 3, thermally treating the prefabricated member in a vacuum thermal treatment furnace to obtain the special alloy thin-walled member. The method for preparing the easily processed prefabricated member, ...

IDP based industrial process dynamic optimization system and method

Method for quasi-in-situ characterization of material corrosion morphology

The invention discloses a method for material corrosion morphology quasi-in-situ characterization, and relates to a method for material corrosion morphology characterization. The method aims at solving the problems that an existing material corrosion morphology in-situ characterization method is harsh in test condition, limited in corrosion environment and the like. The method comprises the following steps: pretreating a to-be-corroded sample, marking the position of the to-be-corroded sample, carrying out microstructure characterization on the position-marked sample before corrosion, corroding the sample, cleaning the corroded sample in the step 4, and carrying out dynamic observation on the microstructure characterization morphology again. According to the invention, the diamond indentation of the Vickers hardness tester is used as a mark position, and the material is corroded in a corrosive atmosphere for a plurality of time periods, so that the corrosion morphology of a certain area ...

Simple and direct inter metallic compound preparation and forming method

A process for preparing and shaping intermetallic compound includes such steps as filling the powder of high-smelting-point metal in intermetallic compound in impression of mould, making prefabricated block, smelting the low-smelting-point metal in intermetallic compound, Al or Al-alloy and pressurized exhaust casting to penetrate molten Al or Al-alloy into said prefabricated block while to shapethe intermetallic compound with the thermal condition generated by reaction.

Method for coating surfaces of glass hollow microbeads with MgO protective film

The invention discloses a method for coating surfaces of glass hollow microbeads with a MgO protective film and relates to a modification method of glass hollow microbeads. The method disclosed by the invention aims at solving the problem in the preparation process of a glass hollow microbeads/Al-Mg-based porous composite material that the porous composite material loses porosity characteristic since the glass hollow microbeads are extremely likely to react with a substrate. The method comprises the following steps: I, ultrasonically cleaning the glass hollow microbeads; II, preparing MgO sol; III, coating; VI, repeatedly coating; and V, sintering. The glass hollow microbeas/Al-Mg alloy system has fixed chemical components. MgO is one of the fixed chemical components in the two systems and MgO is selected to coat the hollow microbeads without introducing new impurities into the composite material. A sol-gel method is one of the main means of preparing an oxide coating and the method has ...

High-strength plasticity aluminum-base composite material employing TiB2 particles and preparation method thereof

The invention provides a high-plasticity aluminum-based composite material containing TiB2 particles and a preparation method thereof, and relates to an aluminum-based composite material and a preparation method thereof. The invention solves the problems of the prior art, such as poor plasticity and toughness and difficulty in secondary processing. The composite material contains (by volume) titanium diboride reinforcement particles 10-25 percent, aluminum particles 25-35 percent, and aluminum alloy matrix in balance. The preparation method comprises: (1) weighing titanium diboride reinforcement particles, aluminum particles and aluminum alloy matrix; (2) mixing by mechanical dry method to obtain a reinforcement powder; (3) placing the reinforcement powder in a die and compression-molding; (4) heating the die; (5) melting aluminum alloy and casting in the die; (6) applying a pressure on the die with molten aluminum and maintaining the pressure for a period of time and cooling; (7) demoulding ...

Low expansion superhigh silicon aluminum alloy and method for making same

The low expansion Si-Al alloy has very high Si mass ratio of 61.6-70.8 %. The preparation process includes loading Si into mold cavity and pressing with punch head to form pre-fabricated block; preheating the mold to 500-600 deg.c and heating aluminum material to melt; casting aluminum into the mold; pressing with punch head; maintaining the pressure of the punch head while cooling the mold; demolding; and high temperature annealing of the cast ingot. The Si-Al alloy has high Si content, low density, high compactness, low expansion and other performance. The extrusion casting process to add Si element into Al alloy to form Si-Al alloy with very high Si content uses simple preparing apparatus and has low cost.

Multilayer composite endergonic material

The present invention relates to a multilayer composite energy-absorbing material and its preparation method. Said multilayer composite energy-absorbing material includes external buffer layer, energy-absorbing layer, high-rigidity layer and internal buffer layer. The inner surface of said external buffer layer and outer surface of said energy-absorbing layer are combined together by using silicone adhesive, the inner surface of said energy-absorbing layer and the outer surface of high-rigidity layer are combined together by using silicone adhesive, and the inner surface of said high-rigiditylayer and outer surface of internal buffer layer are combined together by using silicone adhesive. Besides, said invention also provides the concrete steps of its preparation method.

Self-lubricating aluminum-based composite material and method for preparing same

The invention provides a self lubrication aluminum based composite material and a preparation method thereof, relating to an aluminum based composite material and a preparation method thereof. The invention solves the problems of high requirement on equipment, high cost, poor material performance and difficult second shaping and mechanical processing of materials in the synthesis of the prior self lubrication aluminum based composite material. The self lubrication aluminum based composite material is prepared from titanium diboride reinforced particles, aluminum particles or aluminum alloy particles, boron nitride particles and matrix aluminum alloy. The preparation method comprises the following steps: 1. raw materials are weighted according to the volume ratio; 2. the materials except for aluminum alloy are subjected to mixing and preliminary shaping to obtain the prefabricated part, and the prefabricated part is put in a mould and heated; 3. the aluminum alloy is heated until the aluminum ...

Preparation methods of magnesium-based porous composite material containing Al2O3 hollow spheres

The invention relates to preparation methods of a magnesium-based porous composite material, and concretely relates to preparation methods of a magnesium-based porous composite material containing Al2O3 hollow spheres. The invention solves the problems of complex method and high cost of present preparation methods of the magnesium-based porous composite material. The preparation methods disclosed in the invention comprise a method 1 and a method 2. The method 1 comprises the steps of Al2O3 hollow sphere filling, preheating, casting, pressure impregnation, dwelling cooling and demolding. The method 2 comprises the steps of mixing of Al2O3 hollow spheres having different particle sizes, filling, preheating, casting, pressure impregnation, dwelling cooling and demolding. The magnesium-based porous composite material containing Al2O3 hollow spheres is prepared by impregnating magnesium or a magnesium alloy into a gap between Al2O3 hollow sphere precast blocks and has the common characteristics ...

Method for preparing special alloy thin-walled member

The invention discloses a method for preparing a special alloy thin-walled member, which relates to a method for preparing a thin-walled member and solves the problems of processing difficulty, high cost and poor precision of the conventional method for preparing the alloy thin-walled member by first preparing iron-based or nickel-based special alloy by using a casting or powder metallurgy method and then machining the iron-based or nickel-based special alloy. The method comprises the following steps of: 1, processing a prefabricated member of the thin-walled member by using a material consisting of main elements in the special alloy; 2, depositing other elements except the main elements contained in the prefabricated member on the surface of the prefabricated member in a plating form; and 3, thermally treating the prefabricated member in a vacuum thermal treatment furnace to obtain the special alloy thin-walled member. The method for preparing the easily processed prefabricated member, ...

Method for high-yield preparation of high-purity SiC nanowires through layer-by-layer assembly

The invention discloses a method for preparing high-purity SiC nanowires with high yield through layer-by-layer assembly, and relates to the field of methods for preparing the high-purity SiC nanowires. The invention aims to solve the problems of complex and harsh synthesis process, long preparation period, high cost, low nanowire purity and low yield of the existing SiC nanowire. The method comprises the following steps: 1, pretreating silicon powder and a carbon substrate; and 2, synthesizing the SiC nanowire. According to the method, the concentration distribution of reaction gas is broken, a large number of high-purity nanowires can be obtained on the graphite substrate, a large number of nanowires can also be obtained at the silicon source position, the nanowires grow at the graphite substrate and the silicon source position, and the yield of the nanowires is remarkably improved. The SiC nanowire prepared by the method has a wide application prospect in the fields of high-temperature ...

Compound technique for submicrometre ceramic particle and aluminium alloy

Compound technique for submicrometre ceramic particle and aluminium alloy

The compounding technology for ceramic particles in sub-micrometer class and aluminium alloy features that when solution of basic metal is osmosizing into prefabricated block, its pressure is controlled to change in step mode, so the osmosis is in pulsation mode to obtain composite material with high plasticity, compactness and bulk factor.

Method for preparing beryllium/aluminum composite material with high interface contact area by utilizing recycled beryllium waste material

The invention discloses a method for preparing a beryllium/aluminum composite material with a high interface contact area by utilizing recycled beryllium waste, and relates to a preparation method of a beryllium chip/aluminum composite material. The problems that an existing beryllium/aluminum composite material is high in preparation cost and low in interface bonding strength are solved. The preparation method comprises the steps that beryllium waste is machined into beryllium chips in a machining mode, cold pressing treatment is carried out after cleaning, a preform is obtained, aluminum metal is heated into aluminum metal melt, pressure infiltration treatment is carried out, a beryllium chip/aluminum composite material cast ingot is obtained, thermal deformation machining is carried out, and then the beryllium chip/aluminum composite material is obtained. According to the method, the beryllium waste is processed into the sawtooth-shaped beryllium cuttings for preparing the beryllium/ ...

Preparation method of in-situ synthesis silicon nitride reinforced aluminum-based composite material

The invention discloses a preparation method of an in-situ synthesis silicon nitride reinforced aluminum-based composite material, and relates to a preparation method of an aluminum-based composite material. In order to solve the problems that wettability of silicon nitride and molten aluminum is poor, a bonding interface is poor, silicon nitride is not uniformly dispersed in an aluminum matrix, is easy to gather and is not small enough in size, and plasticity of a prepared silicon nitride reinforced aluminum matrix composite material is reduced. The method comprises the following steps: sequentially weighing a silicon-nitrogen precursor and aluminum powder, carrying out ball-milling dispersion, carrying out cold press molding on a preform, putting the preform into a vacuum atmosphere furnace, and carrying out heating reaction, spark plasma reaction sintering, hot extrusion deformation treatment and component homogenization. According to the method, a silicon nitride ceramic reinforcement ...

Method for preparing metal-matrix composite by vacuum pressure infiltration

The invention discloses a method for preparing metal matrix composite by vacuum pressure infiltration, relating to a method for preparing metal matrix composite. The method aims at solving the problems of low working pressure, expensive equipment investment for one time and complicated process existing in the current vacuum pressure infiltration method. The method of the invention comprises the steps that: the degree of vacuum in a vacuum container reaches 1Pa to 10 <-3> Pa; the temperature of the vacuum container increases to 5 DEG C to 200 DEG C higher than the melting point of a metal alloy by heating and is kept constant for 10 to 90 minutes; the pressure in a mould is 0.1MPa to 200MPa and is kept constant for 20 to 60 minutes. The method of the invention can prepare the metal matrix composite provided with the performance of excessively large critical infiltration pressure that the current vacuum pressure infiltration method can not prepare. Compared with the traditional method, the ...

Preparation method of diamond reinforced aluminum-based composite material with high corrosion resistance

The invention relates to a preparation method of a diamond reinforced aluminum-based composite material, in particular to a preparation method of a high-corrosion-resistance diamond reinforced aluminum-based composite material. In order to solve the problem of corrosion failure of the diamond particle reinforced aluminum-based composite material in a complex service environment, generation of an interface product Al4C3 is inhibited. The method comprises the steps that diamond particle surface plating is conducted, specifically, the diamond particles are subjected to segmented heating treatment under the protective atmosphere, a uniform metal plating layer is prepared on the surfaces of the diamond particles through a magnetron sputtering method, and an assembled mold is filled with the diamond particles for air pressure infiltration; the corrosion rate of the diamond/aluminum composite material obtained through the method is reduced by 80% or above compared with that of a treated diamond ...

Reinforcement method for continuous filament reinforced metallic matrix composite

The invention discloses a reinforcement method of a continuous fiber-reinforced metal matrix composite, relates to the fiber-reinforced metal matrix composite, and aims at solving the problems that the rigidity and the strength character of a structural piece of the fiber-reinforced metal matrix composite are low along the thickness direction, the strength of in-plane shear and interlaminar shearis low, the impact ductility is low, and delamination is easy to occur. The reinforcement method is realized according to the steps as follows: after a fiber prefabricated part (2) is prepared, a wire(1) is added in the fiber prefabricated part (2), the fiber prefabricated part (2) and a composite material matrix (3) are processed through molten metal infiltration by heating, and the reinforcement to the continuous fiber-reinforced metal matrix composite is completed after cooling. Because the wire originally has high strength and high toughness and has stronger binding capacity with the matrix, ...

Method for preparing coat of silicon carbide on surface of carbon fiber