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High-strength lamellar Al-based metal ceramic composite material and preparation method thereof

A ceramic composite material and high-strength layer technology, which is applied in the direction of ceramic products, metal layered products, chemical instruments and methods, etc., can solve the problems of high cost of composite material preparation, single types of reinforced ceramics, cumbersome operation, etc., and achieve equipment The effect of low requirements, low manufacturing cost and simple process

Inactive Publication Date: 2014-07-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems of high preparation cost, cumbersome operation, single type of reinforcement ceramics and low strength of the composite material existing in the prior art, and provide a high-strength layered Al-Si-Mg shell-like structure / (Al 2 o 3 , SiC, TiC) composite material and preparation method thereof

Method used

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  • High-strength lamellar Al-based metal ceramic composite material and preparation method thereof
  • High-strength lamellar Al-based metal ceramic composite material and preparation method thereof
  • High-strength lamellar Al-based metal ceramic composite material and preparation method thereof

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preparation example Construction

[0051] High-strength layered structure Al-Si-Mg / (Al 2 o 3 , SiC, TiC) the steps of composite material preparation method are as follows:

[0052] 1. Preparation of water-based ceramic slurry:

[0053] Dissolve the dispersant (ammonium polyacrylate or sodium polymethacrylate or sodium carboxymethyl cellulose) and binder (polyvinyl alcohol) in deionized aqueous solution at 60°C, and then mix with ceramic Al 2 o 3 or ceramic SiC or ceramic TiC powder, and use a planetary ball mill with a rotation speed of 100r / min to perform ball milling for 12h to make a ceramic slurry, wherein the solid phase ceramic (Al 2 o 3 or SiC or TiC) powder accounts for 20-40% of the volume of the entire slurry, and the dispersant content is solid phase ceramics (Al 2 o 3 or SiC or TiC) powder mass of 0.8 to 2%, the binder content is solid phase ceramics (Al 2 o 3 or SiC or TiC) powder mass of 0.5-2%, the slurry after ball milling is then vacuum stirred and degassed for 20min, and the stirring s...

Embodiment 1

[0065] 1. Preparation of water-based ceramic slurry:

[0066] Using sodium polymethacrylate as a dispersant and polyvinyl alcohol as a binder, they were dissolved in deionized aqueous solution at 60°C, and then mixed with ceramics (Al 2 o 3 ) powders, and use a planetary ball mill with a rotating speed of 100r / min to perform ball milling for 12h to make a slurry, in which the solid phase ceramics (Al 2 o 3 ) powder accounts for 20% of the volume of the entire slurry, and the dispersant content is solid phase ceramics (Al 2 o 3 ) 2.0% of the powder mass, the binder content is solid phase ceramics (Al 2 o 3 ) 2.0% of the mass of the powder, the slurry after ball milling was vacuum stirred and degassed for 20 minutes, the stirring speed was 80-100r / min, and the water-based ceramics (Al 2 o 3 ) slurry.

[0067] 2. Directional solidification:

[0068] Water-based ceramics (Al 2 o 3 ) slurry is injected into the polytetrafluoroethylene mold, and directional solidification...

Embodiment 2

[0078] 1. Preparation of water-based ceramic slurry:

[0079] Using sodium polymethacrylate as a dispersant and polyvinyl alcohol as a binder, they were dissolved in deionized aqueous solution at 60°C, and then mixed with ceramics (Al 2 o 3 ) powders, and use a planetary ball mill with a rotating speed of 100r / min to perform ball milling for 12h to make a slurry, in which the solid phase ceramics (Al 2 o 3 ) powder accounts for 40% of the volume of the entire slurry, and the dispersant content is solid phase ceramics (Al 2 o 3 ) 2.0% of the mass, the binder content is solid phase ceramics (Al 2 o 3 ) 2.0% of the mass of the powder, the slurry after ball milling was vacuum stirred and degassed for 20 minutes, the stirring speed was 80-100r / min, and the water-based ceramics (Al 2 o 3 ) slurry.

[0080] 2. Directional solidification:

[0081] Water-based ceramics (Al 2 o 3 ) slurry was poured into a polytetrafluoroethylene mold and directional solidified in a low-tempe...

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Abstract

The invention discloses a high-strength lamellar Al-based metal ceramic composite material and a preparation method thereof, aiming at solving the problems of high preparation cost, complex operation, single type of reinforcement ceramic and low strength. The high-strength lamellar Al-based metal ceramic composite material, i.e., high-strength lamellar structure Al-Si-Mg / (Al2O3, SiC, TiC) composite material comprises ceramic powder and Al-Si-Mg alloy. The volume fraction of ceramic powder is 20%-40vol%; the volume fraction of Al-Si-Mg alloy is 80%-60vol%; the mass ratio of aluminum in the Al-Si-Mg alloy is 75-84wt%; the mass ratio of silicon is 10-15wt%; the mass ratio of magnesium is 6-10wt%. The preparation method of the high-strength lamellar Al-based metal ceramic composite material comprises the following steps: preparation of water-based ceramic slurry; directional solidification; freezing and drying; sintering of blanks; smelting of alloy; and non-pressure infiltration.

Description

technical field [0001] The invention relates to a material in the field of new material preparation and a preparation method thereof, more precisely, the invention relates to a high-strength layered Al-based cermet composite material and a preparation method thereof. Background technique [0002] Metal matrix composites have high specific strength, specific modulus, good wear resistance, heat resistance, electrical conductivity, thermal conductivity and low thermal expansion coefficient, and are widely used in aerospace, automotive machinery, electronics industry and national defense military industry and other fields , but due to the addition of brittle ceramic reinforcements, the plasticity and toughness of the composite material are reduced to varying degrees, and secondary processing is difficult. In order to improve the strength and toughness of composite materials and imitate the high strength, high toughness and high crack resistance endowed by the fine layered struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/04B32B9/04C22C21/02C04B35/565C04B35/56C04B35/10C04B38/00C04B35/622
Inventor 沈平阿拉腾沙嘎奚巨伟孙畅姜启川
Owner JILIN UNIV
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