Abstract Cu-15 wt%Ni-8 wt%Sn (CuNiSn) bronze alloy shows promising bearing performance when used in tribological applications and has attracted increasing research interest. In this work, the tribological performance of CuNiSn in terms of friction and wear were investigated in a ball-on-disc contact configuration, sliding against a Al2O3 ball under varying normal loads (1 and 4 N) and environmental temperatures (room temperature (~18 °C) and 110 °C). Post-test characterization techniques, including optical profilometry, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and transmission electron microscopy (TEM) were adopted to characterize the wear track on the CuNiSn surface after 13,500 cycles of reciprocating sliding. Both friction and wear behaviour was found to depend on the load and temperature whilst wear resistance reduced with increased temperature. A mechanically mixed layer (MML) and plastic deformation layer (PDL) were characterized by TEM micrographs of the cross-section from the wear track. Under 4 N load, a 1–1.5 μm thick tribolayer was developed during sliding at room temperature compared with a 200–300 nm tribolayer at 110 °C. The friction and wear mechanisms were largely dominated by properties of the tribolayers which were initially associated with and affected by load and temperature.

中文翻译：

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脂润滑的Cu-15 wt%Ni-8 wt%Sn青铜在室温和高温下的摩擦磨损

摘要 Cu-15 wt%Ni-8 wt%Sn (CuNiSn) 青铜合金在摩擦学应用中显示出良好的轴承性能，并引起了越来越多的研究兴趣。在这项工作中，CuNiSn 在摩擦和磨损方面的摩擦学性能在球盘接触配置中进行了研究，在不同的正常载荷（1 和 4 N）和环境温度（室温（~ 18 °C) 和 110 °C)。采用光学轮廓测定法、扫描电子显微镜 (SEM)、能量色散 X 射线 (EDX) 和透射电子显微镜 (TEM) 等测试后表征技术来表征 CuNiSn 表面经过 13,500 次往复滑动循环后的磨损轨迹。发现摩擦和磨损行为都取决于载荷和温度，而耐磨性随温度升高而降低。机械混合层 (MML) 和塑性变形层 (PDL) 通过磨损轨迹横截面的 TEM 显微照片进行表征。在 4 N 负载下，与 110 °C 下的 200-300 nm 摩擦层相比，在室温滑动过程中形成了 1-1.5 μm 厚的摩擦层。摩擦和磨损机制主要由摩擦层的特性决定，这些特性最初与负载和温度相关并受其影响。与 110°C 下的 200-300 nm 摩擦层相比，在室温下滑动过程中形成了 5 μm 厚的摩擦层。摩擦和磨损机制主要由摩擦层的特性决定，这些特性最初与负载和温度相关并受其影响。与 110°C 下的 200-300 nm 摩擦层相比，在室温下滑动过程中形成了 5 μm 厚的摩擦层。摩擦和磨损机制主要由摩擦层的特性决定，这些特性最初与负载和温度相关并受其影响。