氮化物陶瓷颗粒增强铜基复合材料的干摩擦磨损性能研究

采用粉末冶金工艺制备了纯铜以及AlNp／Cu和TiNp／Cu系列铜基复合材料，研究了2种复合材料在不同颗粒含量、不同载荷及滑动速度等条件下与45^#钢对摩时的干摩擦磨损性能，用扫描电子显微镜观察其磨损表面形貌，用能谱仪分析了磨损表面的元素组成．结果表明：与纯铜相比，AlNpCu及TiNp／Cu复合材料的耐磨性能显著提高，随着氮化物颗粒含量增加，2种复合材料的磨损率先下降而后趋于稳定；载荷与滑动速度提高引起的热效应使得纯铜及其复合材料的磨损率增高；由于TiNp的硬度高于AlNp以及本身具有一定的自润滑性能，使得TiNp／Cu复合材料的耐磨减摩性能优于AlNp／Cu复合材料．

Study on Dry Friction and Wear Properties of Copper-matrix Composites Reinforced with Nitrides Ceramics Particles

Pure copper and its composites reinforced with AlNp and TiNp were prepared by powder metallurgy. Dry friction and wear properties of pure copper and its composites reinforced with AlNp and TiNp of different volume fractions were investigated under various loads and sliding velocity. Worn surface morphologies of pure copper and its composites were observed on a scanning electron microscope, element constitute of wear surface was investigated by energy dispersive spectrometry. As a results, copper matrix composites reinforced with AlNp and TiNp exhibited much better wear-resistance than that of pure copper. Wear rate of AlNp/Cu and TiNp/Cu composites decreased steadily as the particle contents increased. As load and sliding velocity increased, thermal effect aggravated wear rate of pure copper and its composites. Wear rate and friction coefficients of TiNp/Cu are lower than that of AlN/Cu composites, the reason is that hardness of TiNp is higher than that of AlNp and TiNp possess self-lubrication properties.