界面调控对类金刚石碳基薄膜在甲烷气氛下摩擦学性能的影响

在甲烷气氛下，利用不同材质摩擦副与非晶碳(a-C)基薄膜构成不同的自配副与非自配副摩擦体系，构建出不同的滑动界面，通过研究非晶碳(a-C)基薄膜与不同摩擦副对摩时的摩擦学行为，分析探索滑动界面对体系摩擦学行为的作用机理. 结果表明:摩擦副对a-C薄膜的摩擦学行为影响较为明显，主要通过影响滑动界面碳悬键的再杂化形式来引起体系摩擦学行为差异；甲烷解离基团对碳悬键的钝化能够有效降低体系摩擦系数，但过多的钝化形成多聚a-C:H，对体系造成不利影响. 研究结果为烃类下提高DLC薄膜的减磨作用提供参考. 

Probing the Tribological Properties of Diamond-Like Carbon under Methane by Tailoring Sliding Interface

Currently, hydrocarbons have attracted much attention, but the problem caused by the wear of the moving parts urgently needs to be solved. Diamond-like carbon (DLC) films are widely used in many fields due to their excellent tribological properties. However, the mechanism for tribological behavior of DLC film under hydrocarbon atmospheres is still unclear. Here, the tribological behavior of amorphous carbon (a-C) film with different counterpart balls was studied. The mechanism of the friction behavior of these systems was investigated. And the results show that the counterpart balls had a significant influence on the tribological behavior of a-C film, which mainly causes the different tribological behavior between these system by affecting the re-hybridization form of the sliding interface. Moreover, the passivation of the carbon dangling bonds with groups dissociated from the methane can effectively reduce the friction of the system, but excessive passivation resulted in the formation of poly-a-C:H, which adversely affected the system. The results provide a reference for improving the anti-wear and lubrication properties of DLC film under hydrocarbons.