Effects of counterpart materials on the current-carrying friction and wear properties of copper-graphite composites
WU Haihong1,2,3, WANG Nenghui2, ZHANG Lisong2, YE Jiayu2, WANG Chuanfeng2, TU Youwang3, KANG Xiao3
1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. CSSC Jiujiang Marine Equipment (Group) Co.,Ltd., Jiujiang 332008, China; 3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
Abstract To investigate the current-carrying friction and wear properties and underlying mechanisms of copper-graphite composites against different counterpart materials, two types of copper-graphite composites with varying graphite contents were prepared using the pressure sintering method. T2 copper, QCr0.8 copper-zirconium alloy, and hard gold-plated copper were selected as counterpart materials for current-carrying friction and wear tests. The microstructure, hardness, and friction and wear properties of the materials were examined using scanning electron microscopy, nanoindentation, surface profilometry, and pin-on-disk friction and wear test apparatus. The results show the average friction factors of the copper-graphite composites range between 0.4 and 0.5, the wear rates are on the order of 10-13 m3/(N·m), the average voltage drop ranges from 0.7 V to 1.4 V, and the average electrical noise ranges from 0.2 mV to 0.7 mV when grinding with the three counterpart materials. Among these, the copper-graphite composite exhibits the best current-carrying friction and wear properties when paired with QCr0.8
WU Haihong,WANG Nenghui,ZHANG Lisong, et al. Effects of counterpart materials on the current-carrying friction and wear properties of copper-graphite composites[J]. Materials Science and Engineering of Powder Metallurgy, 2024, 29(5): 384-395.
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2024, Vol. 29 
