Preparation method of directionally distributed prestressed carbon fiber reinforced aluminum matrix composite

Abstract

The invention relates to the field of aluminum alloy preparation, and discloses a preparation method of a directionally distributed prestressed carbon fiber reinforced aluminum matrix composite. The preparation method of the directionally distributed prestressed carbon fiber reinforced aluminum matrix composite comprises the following steps of (1) applying pretension to carbon fibers arranged in the same direction, and fixing with a mold to obtain directionally arranged carbon fibers; (2) pouring an aqueous solution of a surfactant into the mold, fully infiltrating, and drying to obtain the carbon fibers coated with the surfactant; and (3) pouring molten aluminum into the mold, carrying out ultrasonic oscillation, and then cooling to obtain the carbon fiber reinforced aluminum matrix composite. According to the preparation method provided by the invention, the carbon fibers are coated with the surfactant, so that the compatibility between the carbon fibers and an aluminum matrix can beeffectively improved, and the mechanical property and the heat-conducting property of the composite are improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy preparation, in particular to a preparation method of directional distributed prestressed carbon fiber reinforced aluminum matrix composite material. Background technique [0002] Aluminum matrix composite material is a common metal matrix composite material. It has low density, light weight, good plasticity, easy processing, and good high temperature performance. Compared with other materials, it has good physical and mechanical properties, and is very suitable for preparing electricity. The system uses high thermal conductivity and high mechanical strength materials. Carbon fiber reinforced aluminum matrix composites (Carbon Fiber Reinforced Aluminum Matrix Composites, referred to as Cf / Al composites) is a general term for a class of composite materials with carbon fiber as reinforcement and aluminum or aluminum alloy as the matrix. It has good wear resistance, Low thermal expansion coefficient, e...

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Problems solved by technology

This method improves the interfacial wettability between aluminum and carbon fibers by plating copper on the surface of carbon fibers, but compared with Cf / Al composites, the thermal conductivity of copper is lower (401W / m·K), which will affect the The thermal conductivity of composite materials has an impact on

Therefore, there is still a lack of a simple and efficient method to improve the compatibility of Cf / Al interface to obtain aluminum matrix composites with high thermal conductivity and high mechanical properties.

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