Method for preparing graphene-reinforced aluminum matrix composite material by injection molding

Abstract

The invention relates to a method for preparing a graphene-reinforced aluminum matrix composite material by injection molding, and aims at the situation that graphene is unevenly dispersed in an aluminum alloy matrix and is difficult to form firm interface combination with the matrix, semi-solid injection molding method is adopted, aluminum alloy is used as a matrix body, graphene is used as a reinforcing body, and the graphene-reinforced aluminum matrix composite material is prepared through mixing powder, feeding, quantitative conveying, heating, screw shearing, preparing semi-solid slurry,high-speed injection molding. The method is advanced in technology, accurate and detailed in data, and strict in procedures, the hardness of the prepared graphene-reinforced aluminum matrix compositematerial is 82.2HV, the tensile strength of the prepared graphene-reinforced aluminum matrix composite material is 235MPa, an elongation of the prepared graphene-reinforced aluminum matrix composite material is 7.22%, and the method is an advanced preparation method for the prepared graphene-reinforced aluminum matrix composite material.

Description

technical field [0001] The invention relates to a method for preparing graphene-reinforced aluminum-based composite materials by injection molding, and belongs to the technical field of preparation and application of non-ferrous metal composite materials. Background technique [0002] Graphene has excellent mechanical properties, thermal properties and electrical properties, and is an ideal reinforcement for the preparation of metal-based nanocomposites. By adding graphene to the aluminum matrix to prepare graphene-reinforced aluminum-based composites, its comprehensive properties can be improved. In order to expand the application range of aluminum alloy, and create favorable conditions for the industrial production of aluminum matrix composite materials; but graphene is easy to agglomerate, it is difficult to disperse evenly in aluminum alloy, its interface wettability is poor, and it is difficult to form a strong interface with aluminum and aluminum alloy Combined, this i...

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Problems solved by technology

[0004] At present, graphene-reinforced aluminum-based composite materials are mainly prepared by powder metallurgy. This preparation method has complicated molding process and high equipment cost. It can only make parts with simple molding structure and has a long production cycle; another common method is Melting and stirring casting method, the molding process of this method is complicated, the temperature in the process is difficult to control accurately, graphene is easy to agglomerate and be burned by high temperature; compared with it, semi-solid injection molding has a relatively good effect on the preparation of graphene-reinforced aluminum matrix composites. Many potential advantages, this technology is still under scientific research

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