A kind of preparation method of graphene reinforced aluminum matrix composite material

Abstract

The invention relates to a preparation method of a graphene-reinforced aluminum-based composite material. Aiming at the situation that graphene is not uniformly dispersed in an aluminum alloy matrix and difficult to combine with the matrix, a semi-solid squeeze casting method is adopted. Furnace smelting, electromagnetic stirring, pouring, and extrusion casting to make graphene-reinforced aluminum matrix composites. This preparation method has advanced technology, accurate and detailed data, strict procedures, pure slurry, good metallographic structure and no shrinkage cavity. The hardness of the prepared graphene-reinforced aluminum-matrix composite material reaches 87HB, the tensile strength reaches 255Mpa, the elongation rate reaches 8%, and the density reaches 99.6%. It is an advanced preparation method of graphene-reinforced aluminum-matrix composite materials.

Description

technical field [0001] The invention relates to a method for preparing a graphene-reinforced aluminum-based composite material, which 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 one of the most ideal reinforcements for the preparation of metal matrix nanocomposites. The addition of graphene to prepare graphene-reinforced aluminum matrix composites can improve the aluminum matrix composites. Comprehensive performance, thereby expanding the application range of aluminum alloy; it can not only expand the application range of graphene, but also create favorable conditions for the industrial production of aluminum matrix composite materials; but the wettability of graphene and aluminum and its alloys is poor, and the interface binding force is weak , it is difficult to distribute uniformly in t...

AI Technical Summary

Problems solved by technology

[0002] Graphene has excellent mechanical properties, thermal properties and electrical properties, and is one of the most ideal reinforcements for the preparation of metal matrix nanocomposites. The addition of graphene to prepare graphene-reinforced aluminum matrix composites can improve the aluminum matrix composites. Comprehensive performance, thereby expanding the application range of aluminum alloy; it can not only expand the application range of graphene, but also create favorable conditions for the industrial production of aluminum matrix composite materials; but the wettability of graphene and aluminum and its alloys is poor, and the interface binding force is weak , it is difficult to distribute uniformly in the aluminum matrix, which is a difficult problem in the preparation technology of graphene-reinforced aluminum matrix composites

[0003] How to uniformly disperse graphene into the aluminum alloy metal matrix, and at the same time form a good contact interface between graphene and metal without destroying the microstructure of graphene has become a technical problem. Currently, graphene is used as a reinforcing phase to prepare aluminum substrates Composite materials are still in the research stage, and their technology needs to be further improved

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