Ultrahigh molecular weight polyethylene (UHMWPE) composites reinforced with various contents of nanometer sized particles of Cu were prepared by a hot pressing technique. The fretting wear behavior of UHMWPE and the Cu/UHMWPE nanocomposites were evaluated on an oscillating reciprocating friction and wear tester. The study focused on the effect of the Cu nanoparticle contents and the fretting strokes on the fretting wear behavior of the composites. The results showed that both the strokes and the contents of Cu nanoparticles had an influence on the tribological properties of the composites. The friction coefficients and wear rates first decreased and then increased with the increasing of Cu nanoparticles contents. The content corresponding to the lowest friction coefficient was 1.5%. When the amounts of Cu nanoparticle ranged from 0.5% to 1%, the composites showed the lowest wear rates. In general, the higher number of strokes corresponded to the lower wear rates, which were attributed to alleviated abrasion. More importantly, thin and uniform transfer films were formed on the worn surfaces of the steel balls after sliding against the 1% Cu/UHMWPE nanocomposites. Consequently, the wear rate was decreased. It was inferred that the inclusion of Cu nanoparticles is beneficial for improving the wear resistance of the composites.

通过热压技术制备了各种含量的纳米尺寸的铜颗粒增强的超高分子量聚乙烯（UHMWPE）复合材料。在振动往复摩擦磨损测试仪上评估了UHMWPE和Cu / UHMWPE纳米复合材料的微动磨损行为。该研究集中于铜纳米颗粒含量和微动行程对复合材料微动磨损行为的影响。结果表明，铜纳米颗粒的行程和含量均对复合材料的摩擦学性能产生影响。随着铜纳米粒子含量的增加，摩擦系数和磨损率先降低，然后增加。最低摩擦系数所对应的含量为1.5％。当Cu纳米颗粒的量在0.5％至1％的范围内时，复合材料的磨损率最低。通常，较高的行程次数对应较低的磨损率，这归因于减少的磨损。更重要的是，在与1％Cu / UHMWPE纳米复合材料滑动后，在钢球的磨损表面上形成了薄而均匀的转移膜。因此，磨损率降低。可以推断，包含铜纳米颗粒有利于提高复合材料的耐磨性。