Abstract Hydrogenated amorphous carbon (a-C:H) film is considered to protect moving parts operating in natural gas, which is mainly composed of methane. Little knowledge on the key factors governing the tribological performances of a-C:H film in methane atmosphere limits application of film under natural gas. Load influences in the interfacial evolution of a-C:H film give information about above factors. Therefore, experimental and theoretical studies on load effects on frictional properties of a-C:H film under methane atmosphere were explored. It was found that frictional performances of a-C:H film were governed by the interfacial adsorbates and carbon dangling bonds, leading to reduced interfacial interaction with load. Furthermore, the structural influences in the frictional performances of a-C:H film under load were also discussed.

中文翻译：

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基于赫兹弹性接触模型探讨氢化非晶碳膜在甲烷大气中的摩擦学性能

摘要 氢化无定形碳（aC:H）薄膜被认为是保护在天然气中运行的运动部件，天然气主要由甲烷组成。对控制 aC:H 薄膜在甲烷气氛中摩擦学性能的关键因素知之甚少，限制了薄膜在天然气下的应用。aC:H 薄膜界面演变中的负载影响提供了有关上述因素的信息。因此，探索了负载对甲烷气氛下 aC:H 膜摩擦性能的影响的实验和理论研究。发现 aC:H 膜的摩擦性能受界面吸附物和碳悬挂键的控制，导致界面与负载的相互作用减少。此外，还讨论了负载下 aC:H 膜摩擦性能的结构影响。