Preparation method of graphene-reinforced aluminum matrix composite

Abstract

The invention relates to a preparation method of a graphene-reinforced aluminum matrix composite. Aiming at the conditions that graphene is nonuniformly dispersed in an aluminum alloy matrix and is difficult to combine with the matrix, the preparation method adopts a semi-solid squeeze casting method, and comprises the steps of smelting in a smelting and stirring atmosphere oven, electromagnetically stirring, pouring, and conducting squeeze casting to obtain the graphene-reinforced aluminum matrix composite. The preparation method is advanced in process, accurate and detailed in data, and precise in process; a slurry is pure; a metallographic structure is good in compactness without the phenomenon of shrinkage porosity; the prepared graphene-reinforced aluminum matrix composite has the hardness reaching to 87 HB, the tensile strength reaching to 255 MPa, the elongation reaching to 8%, and the compactness reaching to 99.6%; and the preparation method is the advanced preparation method of the graphene-reinforced aluminum matrix composite.

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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