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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Lubrication mechanisms of graphene for DLC films scratched by a diamond tip
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Lubrication mechanisms of graphene for DLC films scratched by a diamond tip

机译：石墨烯对于钻石尖端划伤的石墨烯的润滑机制

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摘要

The lubrication behavior of graphene for diamond-like carbon (DLC) films scratched by a diamond tip is investigated by molecular dynamics (MD) simulations. Graphene can efficiently lubricate the DLC film, and its lubrication performance can be improved by the increase of its layer number but be degraded by its defects and large size. The friction mechanisms of graphene during its lubrication highly depend on normal force, F-N. Under a small F-N, a superlow friction force, F-f, is obtained which represents the super-lubrication of graphene. Under a large F-N, the F-f increases due to the tribochemical reactions of graphene. Such reactions happen before the rupture of the graphene, which indicates the limitations of the super-lubrication of graphene in realistic situations.
机译：通过分子动力学（MD）模拟研究了金刚石状碳（DLC）薄膜的石墨烯的润滑行为。 石墨烯可以有效地润滑DLC膜，并且可以通过其层数的增加来提高其润滑性能，但通过其缺陷和大尺寸降低。 石墨烯在其润滑期间高度取决于法向力，F-N的摩擦机制。 在小F-N下，获得超流摩擦力F-F，其表示石墨烯的超润滑。 在大的F-n下，F-F由于石墨烯的摩擦学化学反应而增加。 这种反应发生在石墨烯破裂之前，这表明石墨烯在现实情况中的超润滑的限制。

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