Fabrication of graphene/Cu composites with in-situ grown graphene from solid carbon source

The high temperature melting and sintering of Cu powder will seriously limit the coverage of graphene on the surface of Cu powder during the in-situ generation of graphene. To solve this problem, MgO was added as a dispersant preventing Cu powders from bonding together due to surface melting during the chemical vapor deposition. The results show that the graphene/Cu powder prepared by this method had higher coverage, and the graphene/Cu composite sintered had better mechanical and anti-corrosion properties. It was attributed to the grain refinement strengthening effect and dislocation strengthening effect by the introduction of graphene. Meanwhile, graphene reduced the coverage of CuCl during Cl⁻ corrosion. Therefore, this method provided a new idea for the preparation of high strength and high corrosion-resistant graphene/Cu composites.