▎ 摘　　要

This article presented a new method to improve the interfacial bonding between graphene nanosheets (GNSs) and magnesium (Mg) matrix by coating Ni nanoparticles on the surface of GNSs. Specifically, the Ni-coated GNSs (Ni-GNSs) refined the grains of Mg matrix compared to GNSs. The Ni nanoparticles reacted with Mg matrix and formed Mg2Ni at GNSs/Mg interface, which significantly improved interfacial bonding between GNSs and Mg matrix. The refined grains and improved interfacial bonding were conducive to increasing the compressive properties of Ni-GNSs/Mg-9Al composite.