A high-strength and high-conductivity copper-based composite material and its preparation method

Abstract

The invention relates to the field of metal composite materials, in particular to a high-strength and high-conductivity copper-based composite material and a preparation method thereof. The preparation method includes: (1) laminating two or more layers of copper foils deposited with graphene and performing hot pressing to form a graphene-copper composite material; (2) passing an inert gas at 700-900°C The graphene-copper composite material is subjected to hot isostatic pressing densification treatment under a pressure of 80-120 MPa. The metal high-strength and high-conductivity copper-based composite material prepared by the invention has good composite effect and has high strength and high conductivity. In addition, the preparation method has a short process and high efficiency, which is beneficial to reduce production costs and save resources, and is also environmentally friendly and convenient for popularization and application.

Description

technical field [0001] The invention relates to the field of metal composite materials, in particular to a high-strength and high-conductivity copper-based composite material and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, aerospace, transportation, mechanical industry, energy chemical industry, communication, electrical, power electronics and national defense have higher and higher requirements on the conductivity and mechanical properties of copper or copper alloys. In order to obtain high-strength and high-conductivity materials, the scientific community at home and abroad has developed high-strength and high-conductivity copper alloy materials and composite materials including Cu-Ag, Cu-Al, and Cu-Cr-Fe. However, most of the materials that have been developed are still in the experimental stage, and they have not been widely used because of the high cost of raw materials and complicated processing and prepara...

AI Technical Summary

Problems solved by technology

Although the obtained material has a certain strength, it mostly depends on the strength of the copper rod itself. Since the proportion of graphene in the whole material is very low, it not only does not bring a great improvement to the overall strength, but also brings The improvement of the conductivity of the material is also very small

At the same time, the method of converting graphene into graphene by adding a reducing agent after first generating graphene oxide leads to low purity of the generated graphene, and there is a large amount of graphite oxide that has not been reduced and is left on the surface of the copper strip, which will further affect the conductivity of the material performance

The special strong acid oxidation preparation process makes the graphene sheet have more defects and more functional groups, which will affect the conduction of electrons and phonons, and will also lead to a decrease in the electrical and thermal conductivity of the material.

Images