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中文摘要：
采用环-块摩擦磨损试验机对比考察了钢-铝摩擦副在液体石蜡与含纳米铜粒液体石蜡润滑下的摩擦磨损特性，研究了对纳米铜添加剂添加量与载荷对其按摩磨损性能的影响，通过对磨损表面粗糙度，形貌及其主要元素找 能谱分析，探讨了纳米铜颗粒作为添加剂时钢-铝摩擦副的润滑机制，结果表明：含0.25%纳米铜颗粒液体石蜡时，钢-铝摩擦副的摩擦磨损性能最优；在不同载荷下纳米铜颗粒可以改善铝的摩擦磨损性能，特别在中等载荷（50-125N）下，其抗磨减摩作用更明显；纳米铜颗粒能够在磨损表面形成一层低剪切强度的铜保护膜，有效地避免粘着磨损，同时阻止铝元素向钢表面的转移，从而显著改善钢-铝摩擦副的摩擦磨损性能。
英文摘要：
Friction and wear properties of steel against aluminum were evaluated on a ring-on-block tribotester. The tests were carried out under lubrication of liquid paraffin （LP） alone and liquid paraffin containing oleic acid surface-modified Cu nanoparticles. Effects of concentration and load on the tribological properties of Cu nanoparticles were investigated. LP containing 0.25% Cu nanoparticles exhibited the best tribological properties and good wear resistance and friction reduction at different loads, especially at applied loads between 50 N and 125 N. Thin copper film formed and spread out on metal surface, which provided low shear strength, prevented transfer of Al to steel surface and reduced friction and wear.
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