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Lubrication performance of graphene-containing oil on steel and DLC-coated surfaces

机译：钢铁和DLC涂层表面上石墨烯油的润滑性能

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Several studies have successfully demonstrated the friction-reduction and anti-wear properties of graphene on the nano- and micro-scales, but our understanding of the tribological behaviour of graphene on the macro-scale remains very limited. Accordingly, this study presents the macro-tribological behaviour of a graphene-containing oil in the lubrication of steel/steel contacts and DLC/DLC contacts. We show that graphene platelets, as additives to the base oil, can, especially in the boundary-lubrication regime, decrease the friction in the DLC/DLC contacts by up to 50%, as well as in the steel/steel contacts by up to 44%. The predominant lubrication mechanism of the graphene platelets was shown to be the formation of a protective tribofilm for both types of surfaces. The effects of the concentration of graphene (0-5 wt.%) and the lubrication regimes on the formation of the tribofilm are also investigated and explained with a schematic 2-D contact model.
机译：几项研究成功地证明了石墨烯对纳米和微观尺度的摩擦还原性和抗磨损性能，但我们对石墨烯的摩擦学行为对宏观规模的理解仍然非常有限。 因此，本研究介绍了含石墨烯的油的宏观摩擦学行为在钢/钢触点和DLC / DLC触点的润滑中。 我们表明石墨烯血小板，作为基础油的添加剂，尤其是在边界润滑制度中，可以将DLC / DLC触点中的摩擦降低至多50％，以及钢/钢接触 44％。 图石墨烯血小板的主要润滑机理被证明是形成两种类型表面的保护性呋脱叶。 还研究了石墨烯浓度（0-5重量％）和润滑制度的影响，并用示意性2-D接触模型解释并解释。

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