Preparation method of high-specific-stiffness aluminum silicon carbide structural part, and high-specific-stiffness aluminum silicon carbide structural part

Abstract

The invention provides a preparation method of a high-specific-stiffness aluminum silicon carbide structural part. Silicon carbide particles and silicon carbide whiskers are mixed according to a proportion, and a certain quantity of the silicon carbide whiskers is added into the silicon carbide particles, so that the strength and toughness of a silicon carbide green body are effectively improved; an aluminum silicon carbide composite material casting formed after a prefabricated part containing the silicon carbide whiskers is infiltrated into an aluminum alloy solution has high specific stiffness, specific strength and wear resistance; and through the method of adding mixed powder into a preheated mold, and carrying out stacking, jolt ramming and aluminum filling, the two working procedures of pressing and sintering forming for the silicon carbide prefabricated part are reduced, the process of powder filling and aluminum filling is adopted and is not limited by the product structure, the machining size is increased, a high-volume aluminum silicon carbide machining working procedure is avoided, the process flow is simplified, the productivity is improved, the cost is reduced, the yield is increased, and the production period is shortened. The invention further provides a high-specific-stiffness aluminum silicon carbide structural part which is compact, excellent in performance and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing a high specific rigidity aluminum silicon carbide structural part and the high specific rigidity aluminum silicon carbide structural part. Background technique [0002] As a composite material, aluminum silicon carbide has the advantages of good density, specific stiffness and mechanical properties compared with traditional metal materials or ceramic materials. Therefore, in harsh application environments with large vibrations, such as aerospace, automotive and other fields, Aluminum silicon carbide is widely used. [0003] However, at present, in military industry, aviation, aerospace and other fields that have high requirements for light weight and wear resistance of materials, during the effective period of service, aluminum silicon carbide generally suffers from deformation and fatigue failure due to low stiffness and strength, ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, provide a method for preparing a high specific stiffness aluminum silicon carbide structural part and a high specific rigidity aluminum silicon carbide structural part, and solve the problem of the aluminum silicon carbide composite material in the prior art. The problems of low rigidity and poor wear resistance have overcome the defects of high manufacturing cost and low yield

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