采用无压熔渗工艺制备一种新型的具有优异耐磨性能的碳纤维整体织物/炭/铜(C/C/Cu)复合材料, 在UMT-3多功能摩擦磨损测试仪上考察复合材料的摩擦磨损行为, 并与粉末冶金方法制备的滑板用炭/铜(C/Cu)复合材料进行了对比分析. 结果表明: C/C/Cu复合材料形成了连通状的网络结构, 其导电性能及力学性能明显优于传统C/Cu复合材料;2种复合材料摩擦系数相近;2种复合材料及其对偶的磨损率随载荷增大而增大;与C/Cu相比, C/C/Cu的耐磨性较优, 且对对偶损伤较小, 在70 N载荷下更为明显. 连通状的网络结构及磨损表面形成的磨屑保护层是C/C/Cu复合材料具有良好摩擦磨损特性的主要原因.
A novel C/C/Cu composite with excellent wear resistance was fabricated by pressureless infiltration. The tribological behavior of the composite was evaluated using UMT-3 test system, and compared with C/Cu composite prepared by traditional powder metallurgy process. C/C/Cu composite has better electrical conductivity and mechanical performance compared to C/Cu composite, which may be attributed to the 3D net-like interconnected structure. The friction coefficients of both composites are similar. The wear rates of both the composites and corresponding counterparts increase with the rising load. C/C/Cu composite shows a significantly better wear resistance and causes small damage to the counterpart, especially under a load of 70 N. The interconnected structure and a continuous debris layer are main causes for favorable tribological characteristics of C/C/Cu composite.
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