Surface modified SiC reinforced aluminum-based composite material and preparation method thereof

Abstract

The invention discloses a surface modified SiC reinforced aluminum-based composite material and a preparation method thereof. The surface modified SiC reinforced aluminum-based composite material is characterized by taking a metal aluminum as a matrix and taking a surface modified SiC porous ceramic as a reinforcement; the preparation method includes the steps that firstly SiC is deposited on a carbon foam substrate through a CVI method; a carbon foam framework is removed through an oxidation method to obtain a SiC porous ceramic blank body; the SiC porous ceramic is further obtained through aPIP method; then porous SiC whiskers are prepared on an outer layer of the SiC porous ceramic through laser sintering; and finally the SiC reinforced aluminum-based composite material is prepared through high-pressure infiltration. The surface-modified SiC reinforced aluminum-based composite material is uniform in structure distribution and good in forming property, and due to surface modification, the strength of the composite material is ensured and the wear resistance of the composite material is improved. By means of the surface modified SiC reinforced aluminum-based composite material, the problems that SiC of a traditional silicon carbide reinforced aluminum-based composite material is not uniformly dispersed in an aluminum matrix, the wear resistance is poor are solved, and the surface modified SiC reinforced aluminum-based composite material can be widely applied to bearing structural parts in the aerospace field.

Description

technical field

[0001] The invention relates to the field of preparation of aluminum-based composite materials, in particular to a surface-modified SiC reinforced aluminum-based composite material and a preparation method thereof. Background technique

[0002] In order to achieve the purpose of reducing fuel consumption and reducing exhaust pollution, in addition to improving vehicle power, vehicle weight reduction is also one of the tasks that major car companies must complete. The brake drum is part of the wheel end assembly and is an unsprung weight. Reducing the unsprung weight by 1Kg is equivalent to reducing the sprung weight by 3-5Kg, so reducing the weight of the brake drum is one of the important ways to reduce the weight of the vehicle. The brake drum and the brake shoe cooperate to realize the braking function. When the brake shoe is in contact with the friction surface of the brake drum, the brake drum not only has to bear severe friction and wear and a large to...

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