ABSTRACT Dry sliding wear experiments were carried out at constant normal load and sliding speed on electrodeposited Ni and Ni-α-nano Al2O3 coatings. The coating surfaces were worn against EN-32 HRc hardened steel in pin-on-disc test rig. The work was concentrated on the pin temperature, frictional force and specific wear rate of the coating which were measured as the function of sliding distance. The Ni coating was reported with lower frictional force and pin temperature in comparison with Ni-Al2O3 composite coating. Specific wear rate of the coating with nanoparticles was found to be lower than that of without particles in the Ni matrix. Pure abrasive nature of wear was reported for Ni-Al2O3 composite coating. This resulted in higher pin temperature for the composite coating with nanoparticles. The lower specific wear rate of Ni-Al2O3 is attributed to the hard nature of nanoparticles and resistance to thermal plastic deformation by the coating. Characterization of the coating was carried out by SEM, EDS, XRD analysis. GRAPHICAL ABSTRACT

中文翻译：

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Ni-Al2O3纳米复合涂层干滑动磨损机理及接触温度研究

摘要 在恒定的法向载荷和滑动速度下，在电沉积 Ni 和 Ni-α-纳米 Al2O3 涂层上进行了干滑动磨损实验。在销盘式试验台中，涂层表面与 EN-32 HRc 硬化钢发生磨损。工作集中在销温度、摩擦力和涂层的特定磨损率上，这些值是作为滑动距离的函数测量的。据报道，与 Ni-Al2O3 复合涂层相比，Ni 涂层具有更低的摩擦力和引脚温度。发现含有纳米颗粒的涂层的比磨损率低于镍基体中没有颗粒的涂层。Ni-Al2O3 复合涂层报道了纯磨蚀性质的磨损。这导致具有纳米颗粒的复合涂层的针温度更高。Ni-Al2O3 较低的比磨损率归因于纳米颗粒的坚硬性质和涂层对热塑性变形的抵抗力。通过SEM、EDS、XRD分析对涂层进行表征。图形概要