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A kind of preparation method of al/sic cermet composite material

A composite material and cermet technology, applied in the field of cermet composite materials, can solve the problems of reducing the fluidity of aluminum-based solution, restricting wide application, difficult to industrialized production, etc., and achieves compact structure, high service temperature, and good wear resistance. Effect

Active Publication Date: 2020-05-19
嘉兴睿创新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many manufacturing processes for aluminum / silicon carbide, but the current manufacturing processes are difficult to apply to industrial production
Adding SiC to the aluminum-based solution will greatly increase the viscosity of the original matrix solution, thereby reducing the fluidity of the aluminum-based solution
And if the content of SiC particles is too high, or when the temperature is low, the fluidity will be reduced to a greater extent, which will affect the normal pouring
Since SiC with a large surface energy is mixed, it is easy to absorb bubbles into the aluminum-based solution, resulting in pore defects
Therefore, the manufacturing process of Al / SiC composite materials needs further research and improvement, and the current Al / SiC cermet system also limits its wider application.

Method used

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  • A kind of preparation method of al/sic cermet composite material
  • A kind of preparation method of al/sic cermet composite material
  • A kind of preparation method of al/sic cermet composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh aluminum powder (purity 99.9%, average particle size 1 μm) and silicon carbide powder (purity 99.9%, average particle size 3 μm) according to the proportion, and place them in the grinding body according to the ratio of material to ball ratio of 1:10 , put the material ball in the ball mill tank with absolute ethanol as the dispersion medium, the mass ratio of the mixed powder to absolute ethanol is 1:20, the volume percentage of aluminum powder in the mixed powder is 10%, and the planetary ball mill is used The mixed materials were ball milled at a speed of 150r / min and a ball milling time of 120min. After grinding, the material was dried in a vacuum oven for 24 hours at a drying temperature of 80°C. After the dried material is ground in a corundum mortar, all the powder is passed through a 100-mesh sieve for later use; an appropriate amount of the ground material is placed in a graphite mold used for spark plasma sintering according to the temperature system, pr...

Embodiment 2

[0027] Weigh aluminum powder (purity 99.9%, average particle size 1 μm) and silicon carbide powder (purity 99.9%, average particle size 3 μm) according to the proportion, and place them in the grinding body according to the ratio of material to ball ratio of 1:10 , put the material ball in the ball mill tank with absolute ethanol as the dispersion medium, the mass ratio of the mixed powder to absolute ethanol is 1:20, the volume percentage of aluminum powder in the mixed powder is 20%, and the planetary ball mill is used The mixed material is ball milled at a speed of 150r / min, and the ball milling time is 120min. After grinding, the material was dried in a vacuum oven for 24 hours at a drying temperature of 80°C. After drying, the material is ground in a corundum mortar and all the powder is passed through a 100-mesh sieve for later use; an appropriate amount of the ground material is placed in a graphite mold used for spark plasma sintering according to the temperature syste...

Embodiment 3

[0029] Weigh aluminum powder (purity 99.9%, average particle size 1 μm) and silicon carbide powder (purity 99.9%, average particle size 3 μm) according to the proportion, and place them in the grinding body according to the ratio of material to ball ratio of 1:10 , put the material ball in the ball mill tank with absolute ethanol as the dispersion medium, the mass ratio of the mixed powder to absolute ethanol is 1:20, the volume percentage of aluminum powder in the mixed powder is 5%, and the planetary ball mill is used The mixed material is ball milled at a speed of 150r / min, and the ball milling time is 120min. After grinding, the material was dried in a vacuum oven for 24 hours at a drying temperature of 80°C. After drying, the material is ground in a corundum mortar and all the powder is passed through a 100-mesh sieve for later use; an appropriate amount of the ground material is placed in a graphite mold used for spark plasma sintering according to the temperature system...

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Abstract

The invention relates to a preparation method of an Al / SiC (aluminum / silicon carbide) metal-ceramic composite material, and belongs to the technical field of preparation of metal-ceramic composite materials. The preparation method specifically comprises the following steps of respectively weighing Al powder and SiC powder, placing into a grinding body, performing ball milling on the mixture by a planetary type ball mill, drying the material after ball milling in a vacuum drying box, and screening the powder in a 100-mesh way after drying and grinding for further use; placing the material afterball milling into a graphite die for discharge plasma sintering, and sintering. The preparation method has the advantages that by adopting a discharge plasma sintering technique, the Al / SiC metal-ceramic composite material is prepared at high temperature and high pressure, so that the traditional preparation method of Al / SiC metal-ceramic composite material is broken through; compared with the aluminum-based metal, the prepared Al / SiC metal-ceramic composite material has higher operating temperature; the Al / SiC has better abrasion-resistant property, fracture toughness and corrosion-resistantproperty, so that the application range of Al / SiC is widened.

Description

technical field [0001] The invention relates to a preparation method of an Al / SiC cermet composite material, belonging to the field of cermet composite materials. Background technique [0002] With the development of society, materials play an increasingly important role in various industries, and more and more advanced materials are required to obtain the required properties. In particular, silicon carbide composite materials are widely used in high-tech fields such as aerospace, information development, and national defense. With the continuous deepening and development of science and technology, the requirements for materials are getting higher and higher, and single-material materials are far from being able to meet the needs of science and technology. SiC particle-reinforced Al-based composites have become a research hotspot for many researchers because of their high specific strength, high specific stiffness, low expansion coefficient, and excellent wear resistance. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/06C22C1/05
CPCC22C1/051C22C29/005C22C29/065C22C29/067
Inventor 李庆刚王志史国普黄世峰程新
Owner 嘉兴睿创新材料有限公司