Effects of Ni-coated graphite particles on microstructure and properties of graphite/copper composites
LAI Yuanteng1, GAN Xueping1, XIAO Zhu2, LI Zhiyou1, LI Zhou2, ZHOU Kechao1
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2. School of Materials Science and Engineering, Central South University, Changsha 410083, China
Abstract：Graphite/copper composites with high performance were fabricated by spark plasma sintering (SPS) and Cu coated graphite with Ni pre-coating. The morphologies and microstructures of the composites were characterized by SEM, EDS, TEM and XRD, the effects of nickel content on the physical properties of the composite were investigated. The results show that the Ni coating can improve the interfacial bonding strength between Cu matrix and graphite, and the interface of graphite/Cu composites are composed of copper/(Ni+Ni3P) coating interface and graphite/(Ni+Ni3P) coating interface. The well dispersion of Ni-coated graphite particles in the copper matrix and net-shaped copper matrix can be obtained. Moreover, the hardness, compressive strength and relative density of graphite/copper composites are improved because of the introduction of Ni coating on graphite, and the physical properties increase with increasing the content of Ni coating. The relative density, hardness, and compressive strength of the composites with 10% Ni are 99.68%, 64.58 HB and 281.04 MPa, respectively.
赖远腾, 甘雪萍, 肖柱, 李志友, 李周, 周科朝. 石墨表面镀镍对石墨/铜复合材料微观结构和力学性能的影响[J]. 粉末冶金材料科学与工程, 2018, 23(5): 495-502.
LAI Yuanteng, GAN Xueping, XIAO Zhu, LI Zhiyou, LI Zhou, ZHOU Kechao. Effects of Ni-coated graphite particles on microstructure and properties of graphite/copper composites. Materials Science and Engineering of Powder Metallurgy, 2018, 23(5): 495-502.
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2018, Vol. 23 
