▎ 摘　　要

NOVELTY - Copper alloy composite material comprises 0.55-0.82 wt.% graphene, 0.5-1 wt.% dispersant, and remaining of copper powder, where the high-strength and high-conductivity graphene/copper composite material is a copper-copper chloride-graphene multi-layer composite structure. USE - The copper alloy composite material is used in cable for electronic information and aerospace (claimed), power transmission, automobile manufacturing, and aerospace application. ADVANTAGE - The copper alloy composite material has improved tensile strength, material comprehensive mechanical property and electrical conductivity. The copper and graphene under the action of temperature and stress generate the mutual diffusion of atoms to form a three-layer composite structure diffusion metallurgical bonding layer, so as to improve the bonding force of the two interface, improve the material strength, and improve the mechanical property of the composite material. The method solves the technical problems of weak interface bonding force after the composite of graphene and copper, crack and pore and graphene burning loss and agglomeration. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing the copper alloy composite material, which involves (i) mixing graphene in wetting agent, adding copper powder and dispersant, and drying after stirring to obtain a mixture, (ii) placing the mixture in a ball mill for ball milling, (iii) passing hydrogen to the ball-milled mixture and performing annealing treatment, (iv) performing compression molding the annealed mixture to obtain a sample, (v) pressure sintering the pressed sample, and (vi) cutting the prepared sample and performing hot extrusion processing at 350-400degrees Celsius, and the extrusion ratio of 1:30-1:35.