不同纳米相增强铜基复合材料的性能

Properties of various nano-materials reinforced copper based composites

采用粉末冶金法,制备纳米SiO2颗粒(n-SiO2)、纳米SiC晶须(n-SiCw)和碳纳米管(CNTs)3种不同形态纳米相增强铜基复合材料,通过光学显微镜(OM)、扫描电镜(SEM)和球/盘式摩擦磨损试验机等测试手段研究纳米添加相对铜基复合材料显微组织、物理性能和摩擦学性能的影响。结果表明,纳米相可以显著提高铜基复合材料的硬度,其中n-SiCw的增强效果优于n-SiO2和CNTs;CNTs/Cu的减摩耐磨效果优于SiO2/Cu和SiCw/Cu;0.75%-CNTs/Cu(质量分数)复合材料具有高的硬度、优良的减摩耐磨性能,是综合性能最佳的复合材料。

The nano-materials,including the nano-SiO2 particles（n-SiO2）,nano-SiC whiskers（n-SiCw） and carbon nanotubes（CNTs）,reinforced copper based composites were obtained by powder metallurgy processes.Whose microstructure and physical properties have been investigated by optical microscope and scanning electron microscope,and the tribological properties were also studied using a ball/disk friction tester.The results show that the addition of nano-SiO2 particles,nano-SiC whiskers and carbon nanotubes can contribute to the improvement of copper’s hardness,and in which the contribute of n-SiCw is much more than that of n-SiO2 and CNTs.The tribological performance of CNTs/Cu alloy are better than SiO2/Cu and SiCw/Cu.0.75%-CNTs/Cu alloy has been optimized as the best composite due to possessing relatively higher hardness and excellent tribological performances.