▎ 摘　　要

A bulk Cu/Graphene composite with high electrical conductivity (98.2%IACS) and high hardness (61.2 HV) was fabricated by vacuum hot-press sintering. Cu powder with in-situ grown graphene was prepared by non-toxic, cheap liquid paraffin at lower temperature. The in-situ grown 3D graphene act as an electron transport channel and hinder the movement of the grain boundary. After cold rolling and annealing, the Cu/Graphene composite maintained a high tensile strength of 369.4 MPa, high electrical conductivity of 96.1%IACS and good ductility (6%). Comparing with the pure Cu, the existence of Graphene raised the recrystallization temperature of the composite, and made the composite possess excellent softening resistance. (C) 2020 Elsevier B.V. All rights reserved.