Preparation method of isotropic copper-based isostatic graphite composite material

Abstract

The invention discloses a preparation method of an isotropic copper-based isostatic graphite composite material. The preparation method comprises the following steps: S1, material mixing: selecting petroleum coke, carbon black, special graphite powder and graphene and performing mixed treatment on the petroleum coke, the carbon black, the special graphite powder and the graphene to obtain mixed powder; S2, grinding treatment: adding the mixed powder in the S1 in a Raymond mill and performing grinding treatment on the mixed powder; S3, isostatic molding: putting the mixed powder in the S2 in apress for pressing molding and obtaining a green body; S4, impregnating treatment: putting the green body in the S3 in an impregnating tank and adding medium-temperature pitch. The isotropic copper-based isostatic graphite composite material prepared with the preparation method disclosed by the invention is uniform and fine in structure, high in volume density, excellent in graphite physical and chemical indexes, high in mechanical strength, high in load, little in wear, resistant to high temperature, strong in thermal conductivity, excellent in corrosion resistance, long in service life and strong in stability.

Description

Technical field [0001] The invention relates to the technical field of graphite materials, in particular to a preparation method of isotropic copper-based isostatic graphite composite materials. Background technique [0002] Isostatic graphite not only has great achievements in civil use, but also occupies an important position on the cutting edge of national defense. It is a new type of material and is eye-catching. It is an irreplaceable material for manufacturing single crystal furnaces, metal continuous casting graphite molds, graphite electrodes for electric discharge machining, etc. It is also an excellent material for manufacturing rocket nozzles, deceleration materials and reflective materials for graphite reactors. In recent years, copper-based composite materials have broad application prospects in the fields of mechanical processing, transportation, and micromechanics due to their good electrical, thermal and friction properties. The material has the advantages of hig...

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Problems solved by technology

However, there are still some problems such as low hardness, low density after sintering and high wear rate in the preparation of copper-based composite materials by traditional technology, especially as friction materials and military applications. Therefore, we propose an anisotropic The preparation method of isotropic copper-based isostatic graphite composites is used to solve the above problems