Lubricating performances of graphene oxide and onion-like carbon as water-based lubricant additives for smooth and sand-blasted steel discs
Lubricating performances of graphene oxide and onion-like carbon as water-based lubricant additives for smooth and sand-blasted steel discs
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氧化石墨烯和洋葱状碳作为光滑和喷砂钢盘的水基润滑剂添加剂的润滑性能
DOI：
10.1007/s40544-018-0237-3
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发表时间：
2020-02-01
期刊：
影响因子：
6.8
通讯作者：
Huang, Ping
中科院分区：
文献类型：
--
作者：
Su, Fenghua;Chen, Guofu;Huang, Ping
以天然石墨粉为原料合成氧化石墨烯（GO）纳米片，以蜡烛烟灰为原料合成洋葱样碳（OLC）纳米片，并用透射电镜和拉曼光谱对其进行了表征。用球盘式摩擦计比较评价了氧化石墨烯和氧化石墨烯作为润滑添加剂在水中的润滑性能。研究了喷砂对钢盘表面形貌和摩擦学性能的影响。结果表明，氧化石墨烯和氧化石墨烯两种纳米材料作为润滑添加剂在水中使用时，可有效降低滑动盘的摩擦磨损，且与滑动盘表面处理无关。在施加较重载荷时，可以观察到氧化石墨烯比氧化石墨烯表现出更好的减摩和抗磨能力——微量氧化石墨烯可以达到与大量氧化石墨烯相当的润滑能力。此外，喷砂处理后钢盘的硬度虽然有所提高，但并不能提高钢盘的耐磨性。基于扫描电镜、拉曼光谱和x射线光电子能谱对磨损表面的分析结果，讨论了氧化石墨烯和OLC作为润滑剂添加剂在水中可能的抗磨和减摩机理
Graphene oxide (GO) nanosheets and onion-like carbon (OLC) nanoparticles were synthesized from natural graphite powder and candle soot, respectively, and characterized by transmission electron microscopy and Raman spectroscopy. The lubricating performances of GO and OLC as lubricant additives in water were comparatively evaluated using a ball-on-disc tribometer. The effects of sand blasting of a steel disc on its morphology and tribological property were evaluated. The results show that the two nanomaterials, GO and OLC, when used as lubricant additives in water effectively reduce the friction and wear of the sliding discs, which is independent of the disc surface treatment. On applying heavy loads, it is observed that GO exhibits superior friction-reducing and anti-wear abilities compared to those of OLC—a trace amount of GO can achieve a lubricating ability equivalent to that of an abundant amount of OLC. Furthermore, it is observed that sand blasting cannot improve the wear resistance of the treated steel disc, even though the hardness of the disc increased after the treatment. The possible anti-wear and friction-reducing mechanisms of the GO and OLC as lubricant additives in water are discussed based on results for the wear surfaces obtained by scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy