Tribological characteristics of graphene as grease additive under different contact forms
Tribological characteristics of graphene as grease additive under different contact forms
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DOI：
10.1016/j.triboint.2018.06.026
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发表时间：
2018-11-01
影响因子：
6.2
通讯作者：
Gu, Kecheng
中科院分区：
文献类型：
--
作者：
Wang, Jing;Guo, Xiaochuan;Gu, Kecheng
采用X射线光电子能谱（XPS）和拉曼光谱仪（Raman）研究了石墨烯作为润滑脂添加剂在不同接触形式下的摩擦学性能，并对磨损表面进行了分析，以揭示其摩擦学机理。石墨烯的加入显著提高了润滑脂的抗磨减摩性能。结果表明，石墨烯不仅可以作为沉积膜保护基底，还可以促进Fe 2 O3和Li 2 O摩擦膜的形成。沉积膜和摩擦化学膜的协同作用显著提高了润滑脂的摩擦学性能。此外，石墨烯的易剪切能力在摩擦作用下容易发生层间滑移，从而降低摩擦系数，促进润滑脂的减摩性能。
The tribological properties of graphene as grease additive were investigated under different contact forms and the worn surfaces were examined by X-ray photoelectron spectroscope (XPS) and Raman Spectrometer to reveal tribological mechanism. By the addition of graphene, the antiwear ability and friction reduction performance of grease were significantly improved. It is concluded that graphene can not only act as a deposition film to protect the substrate, but also stimulate formation of Fe2O3 and Li2O tribofilm. And the synergism of deposition film and tribo-chemical film significantly improve tribological properties of grease. In addition, the easy shear capability of graphene is prone to interlayer slip under the action of friction, thus decreasing the friction coefficient and promoting friction reduction performance of grease.