▎ 摘　　要

In this work, graphene nanoplates(GNPs) reinforced Cu-Cr composite coatings were prepared by mechanical alloying(MA) method. In order to further improve the thermal performance, the coatings with different GNPs contents were annealed at 700 degrees C for 1 h. Raman, XRD and SEM were employed to characterize the defect of graphene, the phase transformation and the element distribution of coatings. Consequently, GNPs were detected to be well dispersed in the composite coatings. Moreover, the distributions of Cu and Cr were more homogeneous after annealing. In addition, chromium carbides formed in the coating during the annealing process, and the interfacial bonding in the coating would be further strengthened. Although the defects of GNPs increased during MA process, the thermal properties of as-synthesized samples were still greatly improved compared with Cu substrate.With the increase of GNPs content, the thermal conductivity of as-fabricated samples enhanced initially and then decreased. When the content of GNPs increased to 1.12 vol%, the highest thermal conductivity reached 424.210 W m(-1) K-1. This remarkable result might provide a new idea for GNPs reinforced thermal conductive materials.