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Aluminium-based composite material with high silicon carbide content and preparation method of composite material

An aluminum-based composite material, high silicon carbide technology, applied in the field of silicon carbide particle reinforced aluminum-based composite material, can solve the problems of component segregation, affecting the comprehensiveness of composite materials, poor wettability between silicon carbide particles and aluminum alloy solution, etc. High relative density, solving composition segregation and stomatal inclusions, and good organizational uniformity

Active Publication Date: 2015-04-08
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Silicon carbide aluminum matrix composites prepared by die casting method, spray co-precipitation and other methods have problems such as composition segregation and poor wettability between silicon carbide particles and aluminum alloy solution, which affect the comprehensiveness of composite materials.

Method used

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  • Aluminium-based composite material with high silicon carbide content and preparation method of composite material
  • Aluminium-based composite material with high silicon carbide content and preparation method of composite material
  • Aluminium-based composite material with high silicon carbide content and preparation method of composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The silicon carbide aluminum-based composite material is prepared and proportioned according to the following mass percentages: 40% silicon carbide and 60% aluminum, wherein the particle size of silicon carbide is 10-15um, and the particle size of aluminum powder is 6-10um.

[0028] (2) Put the above raw materials into the stainless steel mixing tank, and put them in according to the ball-to-material ratio of 0.4:1 After sealing the WC ball, turn on the mixer and mix for 8 hours. After mixing, add stearic acid alcohol solution to the mixed powder and continue mixing for 2 hours. Dry it in vacuum at 60°C. The amount of stearic acid added is the same as that of silicon carbide and aluminum 3% of the sum of mass.

[0029] (3) Use an automatic forming press to compress the dried composite powder. The pressing pressure is 250MPa, the pressing speed is 5.2mm / min in both directions, and the pressure is maintained for 50s. The upper punch is started. After the upper punch ...

Embodiment 2

[0034] (1) The silicon carbide aluminum-based composite material is prepared and formulated according to the following mass percentages: silicon carbide 60%, aluminum 40%, wherein the particle size of silicon carbide is 10-15um, and the particle size of aluminum powder is 6-10um.

[0035] (2) Put the above raw materials into the stainless steel mixing tank, and put them in according to the ball-to-material ratio of 0.42:1 After sealing the WC ball, turn on the mixer and mix for 7 hours. After mixing, add stearic acid alcohol solution to the mixed powder and continue mixing for 2.5 hours. Dry it in vacuum at 60°C. The amount of stearic acid added is the same as that of silicon carbide and aluminum 3% of the sum of mass.

[0036](3) Use an automatic forming press to suppress the dried composite powder. The pressing pressure is 270MPa, the pressing speed is 6mm / min in both directions, and the pressure is maintained for 60s. The upper punch is started. After the upper punch is in...

Embodiment 3

[0041] (1) The silicon carbide aluminum-based composite material is prepared and prepared according to the following mass percentages: 50% silicon carbide and 50% aluminum, wherein the particle size of silicon carbide is 10-15um, and the particle size of aluminum powder is 6-10um.

[0042] (2) Put the above raw materials into the stainless steel mixing tank, and put them in according to the ball-to-material ratio of 0.45:1 After sealing the WC ball, turn on the mixer and mix for 8 hours. After mixing, add stearic acid alcohol solution to the mixed powder and continue mixing for 2 hours. Dry it in vacuum at 60°C. The amount of stearic acid added is the same as that of silicon carbide and aluminum 3% of the sum of mass.

[0043] (3) Use an automatic forming press to compress the dried composite powder. The pressing pressure is 260MPa, the pressing speed is 5.5mm / min in both directions, and the pressure is maintained for 55s. The upper punch is started. After the upper punch is ...

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Abstract

The invention relates to an aluminium-based composite material with high silicon carbide content. The aluminium-based composite material with high silicon carbide content is characterized in that the aluminium-based composite material comprises the following components in percentage by mass: 40-60% of silicon carbide and 40-60% of aluminium. The invention also relates to a preparation method of the aluminium-based composite material. A preparation method of the aluminium-based composite material comprises the following steps: burdening, preparing mixed powder, moulding an aluminium silicon carbide composite material, degassing and degreasing under the vacuum condition, carrying out microwave sintering, and carrying out hot pressing deformation. The prepared aluminium-based composite material with high silicon carbide content is high in relative density, stable in performance and good in tissue uniformity and has high strength, modulus and hardness, excellent abrasion resistance and corrosion resistance and excellent high temperature performance. The preparation method of the aluminium-based composite material is simple in process, low in cost and high in efficiency, and the defects of composition segregation and poor wettability of SiC particles with aluminium alloy solution in the prior art are overcome.

Description

technical field [0001] The invention relates to a silicon carbide particle-reinforced aluminum-based composite material, in particular to an aluminum-based composite material with high silicon carbide content and a preparation method thereof. Background technique [0002] With the development of modern science and technology, especially the development of aerospace, rocket, atomic energy, machinery and chemical industries, the requirements for the performance of engineering materials are getting higher and higher, such as high specific strength, high specific stiffness, high temperature resistance, corrosion resistance, Anti-fatigue, etc., which are difficult to achieve for a single metal material, ceramic material or polymer material. [0003] Silicon carbide particle reinforced aluminum matrix composites have excellent mechanical properties such as high specific strength and specific stiffness, excellent wear resistance, low thermal expansion coefficient, low density, good...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C29/06C22C1/05
Inventor 陈子明肖敏强杨文智尚福军黄伟黄伟明张保玉梁栋李德林陈敏杨波
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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