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Preparation method of metal-carbon composite

A technology of carbon composite materials and carbon materials, which is applied in the field of metal matrix composite materials, can solve the problems of unsatisfactory performance and poor compactness, and achieve the effects of low cost, improved sintered compactness, and improved sintered diffusion

Active Publication Date: 2019-04-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical deficiencies of poor compactness and unsatisfactory performance of existing metal-carbon composite materials, the present invention provides a method for preparing metal-carbon composite materials, aiming to obtain good compactness, strength, toughness, etc. Metal-carbon composite material with excellent performance (the present invention is also referred to as composite material for short)

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  • Preparation method of metal-carbon composite
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  • Preparation method of metal-carbon composite

Examples

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Effect test

preparation example 1

[0083] The preparation method of carbon particle embedding copper powder among the present invention is:

[0084] The short carbon fiber bundles are obtained by heat treatment at 700° C. for 50 minutes under an inert atmosphere or vacuum condition; the short carbon fiber bundles have a diameter of 6-8 μm and a length of 1-4 mm.

[0085] The short carbon fiber bundles and copper powder are mixed according to the volume ratio of 1:3 and then ball milled; the mixed powder is obtained; the condition parameters of the ball mill are: the rotating speed is 280r / min, the ball milling time is 6h, and the ball milling balls are stainless steel balls and cemented carbide Balls with a diameter of 3mm to 10mm (the mass ratio of ball milling balls with diameters of 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and 9mm is 4:8:11:20:12:8:6:1). Then sieve 400 mesh sieves, get undersieve, as standby material;

[0086] The spare material was placed in the air, and pre-oxidized at 280°C for 15 minutes; then hyd...

preparation example 2

[0088] The preparation method of carbon fiber embedding nickel powder among the present invention is:

[0089] Dissolve the prepared phenolic resin in an organic solvent to obtain a phenolic resin alcohol saturated solution; then impregnate the short carbon fibers in an 80°C phenolic resin alcohol saturated solution for 2 hours; then dry at 120°C for 2 hours; the short carbon fiber bundle The diameter is 6-8 μm, and the length is 1-4 mm.

[0090] Mix short carbon fiber bundles and electrolytic nickel powder (particle size 150 μm) according to the volume ratio of 2:3 and then perform ball milling; obtain mixed powder; the condition parameters of the ball milling are: the rotating speed is 250r / min, the ball milling time is 4h, and the ball milling balls are Stainless steel balls and hard alloy balls, the ball diameter is 3mm ~ 10mm (the mass ratio of ball milling ball diameters 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm is 4:8:11:20:12:8:6:1 ); Finally, annealing heat treatment is carr...

preparation example 3

[0093] The preparation method of carbon particle embedding iron powder among the present invention is:

[0094] The short carbon fiber bundles are obtained by heat treatment at 700° C. for 60 minutes under an inert atmosphere or vacuum condition; the short carbon fiber bundles have a diameter of 6-8 μm and a length of 1-4 mm.

[0095]Mix short carbon fiber bundles and reduced iron powder (particle size 120 μm) according to the volume ratio of 1:10 and then perform ball milling; the mixed powder is obtained; the condition parameters of the ball milling are: the rotating speed is 250r / min, the ball milling time is 6h, and the ball milling balls are Stainless steel balls and hard alloy balls, the ball diameter is 3mm ~ 10mm (the mass ratio of ball milling ball diameters 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm is 4:8:11:20:12:8:6:1 ). Then sieve 400 mesh sieves, get undersieve, as standby material;

[0096] The spare material was placed in the air, and pre-oxidized at 350°C for 15 min...

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Abstract

The invention relates to a preparation method of a metal-carbon composite, and belongs to the technical field of metal material preparation. Carbon particles are embedded in metal powder to conduct pre-oxidation treatment, carbon particles on the surfaces of metal particles are removed, the metal particles are reduced in a reduction atmosphere, and then the metal particles are mixed with other components to be pressed and sintered to obtain the metal-carbon composite. The preparation method successfully solves the problem that surface sintering is not compact during the sintering process of the metal powder with the carbon particles being embedded in. Under the premise that the metal powder is compact in sintering, the mechanical performance and abrasion resistance of the designed and prepared metal composite are greatly improved. The preparation technology is simple and the cost is low.

Description

technical field [0001] The invention relates to a metal matrix composite material, in particular to a method for preparing a metal-carbon composite material. Background technique [0002] Carbon particles (carbon fiber, graphite, etc.) reinforced metal matrix composites have both high electrical and thermal conductivity, good strength and toughness, corrosion resistance of metals, high strength and toughness of carbon fibers, and lubricating properties of graphite, etc., and are widely used in thermally conductive materials, conductive materials, Friction materials and other fields. [0003] In recent years, researchers have done a lot of research to improve the mechanical properties and high-temperature oxidation resistance of composite materials, mainly focusing on the improvement of the wettability of the carbon / metal interface, through the addition of carbon, such as the carbon surface coated with metal, metal Adding other alloying elements to reduce the wettability of ...

Claims

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Application Information

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IPC IPC(8): C22C47/14C22C49/14C22C49/02C22C49/08C22C101/10C22C121/02
CPCC22C47/14C22C49/02C22C49/08C22C49/14
Inventor 方华婵肖鹏
Owner CENT SOUTH UNIV
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