Abstract Hydrogenated fullerene-like carbon (H-FLC) film is of great potential in reaching macro-scale ultra-low friction. But its friction regime is still under debate. In this study, friction behavior of H-FLC was investigated in vacuum and ambient under various rotational speeds. Results show that friction coefficient is in negative correlation with rotational speed. At rotational speed of 500 rpm, H-FLC film reached ultra-low friction (0.015). Detailed nano-structure evolution research indicates that the odd carbon ring fraction at sliding interface is the origin of H-FLC's low friction. Namely, randomly oriented pentagonal and heptagonal carbon rings were rearranged in wear track, which enhanced the FL content. This work corroborated that rehybridization at frictional interface of H-FLC plays an important role in its ultra-low friction.

中文翻译：

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转速对氢化类富勒烯碳 (FLC) 薄膜在真空中的界面纳米结构演变和摩擦行为的影响

摘要 氢化类富勒烯碳（H-FLC）薄膜在实现宏观超低摩擦方面具有巨大潜力。但其摩擦机制仍在争论中。在这项研究中，研究了 H-FLC 在真空和环境中不同转速下的摩擦行为。结果表明摩擦系数与转速呈负相关。在 500 rpm 的转速下，H-FLC 薄膜达到了超低摩擦（0.015）。详细的纳米结构演化研究表明，滑动界面处的奇数碳环分数是 H-FLC 低摩擦的起源。即，随机取向的五边形和七边形碳环在磨损轨迹中重新排列，从而提高了 FL 含量。这项工作证实了 H-FLC 摩擦界面处的再杂交对其超低摩擦起着重要作用。