A method for preparing graphene-reinforced aluminum matrix composites by injection molding

Abstract

The invention relates to a method for preparing a graphene-reinforced aluminum-based composite material by injection molding. Aiming at the situation that graphene is not uniformly dispersed in an aluminum alloy matrix and it is difficult to form a firm interface with the matrix, a semi-solid injection molding method is adopted. The alloy is the matrix and the graphene is the reinforcement. After powder mixing, feeding, quantitative transportation, heating, screw shearing, preparation of semi-solid slurry, and high-speed injection molding, the graphene-reinforced aluminum matrix composite material is made. This equipment method is advanced and The data is accurate and detailed, the process is rigorous, and the prepared graphene-reinforced aluminum-based composite material has a hardness of 82.2HV, a tensile strength of 235MPa, and an elongation of 7.22%. It is an advanced preparation method of graphene-reinforced aluminum-based composite materials.

Description

Technical field [0001] The invention relates to a method for preparing a graphene reinforced aluminum-based composite material 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, thermal and electrical properties. It 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 performance can be improved. This expands the application range of aluminum alloys and at the same time creates favorable conditions for the industrial production of aluminum-based composite materials; however, graphene is easy to agglomerate and is difficult to disperse uniformly in aluminum alloys, and its interface wettability is poor, and it is not easy to form strong interfaces with aluminum and aluminum alloys. Combined, this is ...

AI Technical Summary

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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