Preparation method of graphene strengthened nickel-aluminum alloy based composite

Abstract

The invention relates to a preparation method of a graphene strengthened nickel-aluminum alloy based composite and belongs to the technical field of metal based composites. In the method, by taking asolid carbon source as a precursor of graphene, the problem that the graphene is difficult to disperse is solved; by utilizing metal aluminum to regulate the solid solution and precipitation process of carbon atoms in a nickel matrix in the solid solution process in the nickel matrix, growth of the graphene is controlled, the graphene with a controllable layer number is prepared, and the graphene,growing in situ, is good in interface bonding force with a nickel-aluminum alloy matrix to have remarkable strengthening and toughening effects to the nickel-aluminum alloy matrix; and in addition, the growth process of the graphene and the densification sintering process of the nickel-aluminum matrix are performed at one step, the preparation process is simple, is good in controllability and issuitable for mass production.

Description

technical field [0001] The invention specifically relates to a method for in-situ preparation of a graphene-reinforced nickel-aluminum alloy-based composite material with a controllable layer number, and belongs to the technical field of metal-based composite materials. Background technique [0002] Graphene is a sp 2 Nanomaterials with a two-dimensional layered structure composed of hybridized carbon atoms. The Young's modulus and strength of single-layer graphene are as high as 1TPa and 130GP a, respectively, the thermal conductivity is about 5000W / m, and the carrier mobility is 15000cm 2 / Vs, specific surface area up to 2600m 2 / g. Due to its high strength, high modulus, ultra-high specific surface area, and good self-lubricating properties, graphene, as a new type of carbon nano-reinforced and lubricating material, has broad application prospects in the field of metal matrix composites. Nickel-based composite materials have the advantages of good high-temperature str...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a method for preparing a graphene-enhanced nickel-aluminum alloy-based composite material, which uses a solid carbon source as the precursor of graphene to solve the problem that graphene is difficult to disperse Problem: Utilize the solid solution process of metal aluminum in the nickel matrix to adjust the solid solution and precipitation process of carbon atoms in the nickel matrix, and then control the growth of graphene, prepare graphene with a controllable number of layers, and the graphene grown in situ is compatible with The interface bonding force of the nickel-aluminum alloy matrix is ​​good, and it has a significant strengthening and toughening effect on the nickel-aluminum alloy matrix

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