The tribological properties of lithium grease with few layer graphene (FLG) additive were studied. Three‐dimensional surface topography, FESEM with EDS and XPS were used to analyse the morphology, distribution of elements and chemical states on the wear spots. The results show that 0.1 wt% FLG content produced maximum reduction rate of the friction coefficient and minimum wear spot diameter (WSD). And the best results obtained under larger load and lower speed. Fe₃O₄ was found to be the main component of the chemical reaction film formed on the friction surface when pure lithium grease lubrication was applied. However, when FLG‐containing lubricating grease was used instead, the boundary film was mainly composed of Fe₂O₃ and adsorbed FLG. The effectiveness of FLG in reducing the friction coefficient and WSD of lithium grease is mainly attributed to its large specific surface area, great number of active groups and typical layered structure.

中文翻译：

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几层石墨烯添加剂对锂润滑脂摩擦学性能的影响

研究了很少添加石墨烯（FLG）添加剂的锂润滑脂的摩擦学性能。使用三维表面形貌，具有EDS的FESEM和XPS分析磨损点的形貌，元素分布和化学状态。结果表明，FLG含量为0.1 wt％时，摩擦系数最大降低率，最小磨损点直径（WSD）。在较大的负载和较低的速度下可获得最佳结果。当使用纯锂油脂润滑时，发现Fe ₃ O ₄是在摩擦表面上形成的化学反应膜的主要成分。但是，当使用含FLG的润滑脂代替时，边界膜主要由Fe ₂ O _3组成并吸附了FLG。FLG降低锂润滑脂的摩擦系数和WSD的有效性主要归因于其大的比表面积，大量的活性基团和典型的分层结构。