A preparation method for in-situ growth of three-dimensional graphene on the surface of spherical copper powder

Abstract

The invention relates to a preparation method for in-situ growth of three-dimensional graphene on the surface of spherical copper powder. Put polymethyl methacrylate and steel balls into a ball mill tank with a mass ratio of 1:10-20, and fill it with argon as a protective atmosphere after vacuuming; after ball milling, polymethyl methacrylate composite powder is obtained; The composite powder and nano-copper powder are mixed according to (0.1‑0.3): 10 and put into a tube furnace for in-situ chemical vapor phase reduction; the temperature is 800 °C, the reducing atmosphere is hydrogen, the protective atmosphere is argon, and the flow rates of hydrogen and argon The ratio is 1:2 to 2:1; the reduction time is 5 to 15 minutes; the carbon atoms generated by the decomposition of polymethyl methacrylate generate graphene on the copper surface, and the in-situ grown three-dimensional graphene-coated copper composite material is obtained. The invention utilizes a ball milling method and a powder metallurgy method to grow graphene in situ, and realizes the strengthening of the copper matrix material, and has good prospects for the application of high-strength copper materials in electronic devices.

Description

technical field [0001] The invention relates to a method for in-situ growth of a three-dimensional graphene-coated copper composite material by powder metallurgy using an in-situ chemical vapor reduction method, and belongs to the technical field of powder metallurgy. Background technique [0002] Copper is a material with good electrical conductivity, ductility and thermal conductivity, and is widely used in industries such as electrical, mechanical and national defense. The fly in the ointment is that the strength of copper is very low. In the application of electronic devices (such as PCB boards), the strength is not high enough to cause various problems, such as shortened lifespan and easy damage. With the development of society and the shortage of energy sources, people have more demands for lightweight and high-strength materials, and copper-based composite materials are an ideal material to meet these requirements. In the preparation of high-strength copper materials...

AI Technical Summary

Problems solved by technology

At present, many studies focus on mixing graphene sheet or reduced graphene oxide directly with copper powder to achieve the purpose of uniform mixing with metal powder, but this will cause graphene agglomeration and damage graphene.

In addition, due to the sheet-like two-dimensional structure, the orientations that graphene sheets can carry in composite materials are limited, and the reinforcing effect of graphene cannot be fully exerted.

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