Abstract This paper examines the mechanical, abrasive and erosive wear properties of a thermal spray enhanced with randomly dispersed solid lubricants. Two different solid lubricants including graphite and polytetrafluoroethylene (PTFE) were mixed with a NiAl2O3 thermal spray to develop a stable thermal coating. The solid lubricants increased the wear resistance of the coating upon the erosion of the spray cover due to the friction of the mating surfaces. The wear and abrasive resistance were investigated by applying the developed thermal coating to a substrate manufactured by Bakelite. The maximum erosion rate was observed upon blasting abrasive Al2O3 powder at 30-degree angle and at an elevated temperature of 160°C. Spray coating with graphite illustrated a stronger surface adhesion and consisted of a superior hardness strength. A sliding steel indenter of 3 mm diameter and a 9 mm stroke length with speeds ranging between 20 to 70 cycles per minute was used to investigate the abrasion rate of the thermal coating. Furthermore, a pull-out test was applied to analyze the adhesive strength of the newly developed thermal coating. The results of the various experimental tests illustrated that Ni based thermal spray infused with graphite solid lubricants has significantly enhanced the lifetime of the thermal coating.

中文翻译：

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石墨和聚四氟乙烯分散体对热喷涂涂层机械、磨蚀和侵蚀磨损性能的影响

摘要 本文研究了用随机分散的固体润滑剂增强的热喷涂的机械、磨蚀和侵蚀磨损性能。将石墨和聚四氟乙烯 (PTFE) 等两种不同的固体润滑剂与 NiAl2O3 热喷涂混合以形成稳定的热涂层。由于配合表面的摩擦，固体润滑剂增加了涂层在喷涂层腐蚀时的耐磨性。通过将开发的热涂层应用到由 Bakelite 制造的基材上来研究耐磨性和耐磨性。在 30 度角和 160°C 的高温下喷射磨料 Al2O3 粉末时观察到最大侵蚀速率。石墨喷涂表现出更强的表面附着力，并具有优异的硬度强度。使用直径为 3 毫米、行程长度为 9 毫米、速度范围为每分钟 20 至 70 次的滑动钢压头来研究热涂层的磨损率。此外，还进行了拉拔试验来分析新开发的热涂层的粘合强度。各种实验测试的结果表明，注入石墨固体润滑剂的镍基热喷涂显着提高了热涂层的寿命。