High-performance aluminum-based composite material and preparation method thereof

Abstract

The invention provides a high-performance aluminum-based composite material and a preparation method thereof. The method comprises the following steps of S1, putting aluminum alloy powder, graphite powder and dry ice into a ball-milling tank for continuous grinding reaction for 1 to 100 hours at the rotating speed of 1000-5000 rpm after the material are sealed so as to obtain an alloy mixture; S2,injecting the alloy mixture into a grinding tool, and carrying out compaction molding by adopting a hydrostatic pressure of 0.1-1 MPa to obtain a structural part precursor; and S3, sintering the structural part precursor by adopting a laser sintering process to obtain the aluminum-based composite material. According to the aluminum-based composite material prepared through the method, the high-quality interface property formed by graphene and aluminum is achieved, the mechanical strength of the aluminum alloy is enhanced, the high strength is still kept while the thickness of an aluminum alloy product is greatly reduced, the aluminum alloy is further subjected to light modification, the method is simple, auxiliaries do not need to be added in the process, and environment-friendly production requirement is met.

Description

technical field [0001] The invention relates to the field of metal composite material processing, in particular to a high-performance aluminum-based composite material and a preparation method thereof. Background technique [0002] Graphene is a new two-dimensional nanomaterial, and graphene nanosheets are made of sp 2 The one-atom-thick two-dimensional material composed of hybrid carbon atoms exhibits a series of unusual physical properties. In 2004, Novoselov et al. used the tape stripping method to prepare graphene nanosheet samples, and characterized their microstructure and physical properties. Due to its special two-dimensional structure, graphene nanosheets have attracted great interest from researchers in the fields of physics, chemistry, and materials science. Basic research and engineering application research on graphene have become a research hotspot in recent years. [0003] The strength of graphene is as high as 1.01Tpa, which is 100 times that of structural ...

AI Technical Summary

Problems solved by technology

Because of the large specific surface area of ​​graphene, it is easy to agglomerate in the aluminum matrix, and the traditional ball milling dispersion method cannot ensure that the graphene is uniformly dispersed in the aluminum matrix, and at the same time, it will form work hardening during the ball milling process. The reinforcement effect of graphene, the mechanical ball milling used in the conventional powder metallurgy process only mixes the powders of the reinforcing phase and the matrix phase uniformly, it is difficult to form interfacial bonding between the powders during the ball milling process, and the energy consumption is reduced by melting and bonding increase; or in order to realize the uniform dispersion and formation of graphene in the aluminum matrix, many additives are added, which not only increases the cost, but also is not friendly to the environment

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