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采用球-面接触方式,在振幅为300μm条件下研究了原位Al2O3颗粒增强铜基复合材料在空气和油介质中的往复滑动磨损行为,采用SEM观察磨痕表面形貌,用非接触式表面形貌分析仪测定磨痕的三维表面形貌及磨损体积损失,研究了载荷和介质对复合材料摩擦系数和磨损量的影响。结果表明:在两种介质中铜基复合材料的摩擦系数随着载荷增加而呈下降趋势;铜基复合材料在油中形成的润滑膜可以显著降低摩擦系数;铜基复合材料在空气中的磨损机制为粘着磨损并伴随有少量磨粒磨损,而在油中的磨损机制为磨粒磨损。
The reciprocal sliding wear behavior of in-situ Al2O3 particle reinforced copper matrix composites in air and oil media was investigated by ball-face contact at 300μm amplitude. The surface morphology of the wear scar was observed by SEM. The non-contact surface Morphology analyzer was used to measure the three-dimensional surface morphology and wear volume loss of the wear scar. The effects of load and medium on the friction coefficient and wear volume of the composite material were studied. The results show that the friction coefficient of copper matrix composites decreases with the increase of load in both media. The lubricating film formed by copper matrix composites in oil can significantly reduce the friction coefficient. The wear of copper matrix composites in air The mechanism is sticking wear with a small amount of abrasive wear and the wear mechanism in the oil is abrasive wear.