▎ 摘　　要

The nano-copper powder and graphene were mixed by mechanical wet ball-milling. Then the graphene/copper (G/Cu) composite material was prepared by spark plasma sintering (SPS). The morphology and microstructure of graphene and copper power were analyzed by SEM, XRD and other test methods to explore the variation relationship between the graphene and the copper power in the ball-milling process. Results show that when the ball-milling time increases to 8 h, the graphene nanoplates have a better combination and distribution on the copper matrix. The improvement of performance is relatively best. The tensile yield strength of the G/Cu composite is 183 MPa, increased by 52.5% compared with Cu matrix; the compressive yield strength is improved more nearly 1.4 times from 150 MPa to 365, MPa; the HV hardness also increases to 1350 MPa; the conductivity of the composites reaches 65.5% IACS. Therefore, the comprehensive performance increases significantly.