Abstract：Ni-based alloys coating on Cu matrix were fabricated by spark plasma sintering (SPS) using Cu matrix and spherical In718 Ni-based alloys powder as raw materials. The effects of dirrerent sintering parameters on the bonding properties and surface properties of the coating were studied. The results show that a diffusion layer generates between Cu matrix and Ni-based alloys coating after SPS, and the diffusion activation energy of matrix and coating are reduced by the pulse current, which can accelerate the diffusion bonding of Cu matrix and Ni-based alloys coating. The Ni-based alloys coating fabricated at the temperature ranging from 850-1 000 ℃ have more excellent performance than Cu matrix by nanoindentation and microhardness testing. When the sintering temperature reaches 950 ℃, the coating has the optimal properties with the microhardness of 370 HV, and the elastic modulus of 179.163 GPa.
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2018, Vol. 23 
