探究低湿度条件下 WC/a-C 薄膜的低摩擦机理

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-11-13 DOI:10.1016/j.triboint.2024.110390

Dongqing He , Xiangxiang Pan , Feng Mao , Lunlin Shang

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引用次数: 0

摘要

在对应物表面形成碳质转移膜会导致 C/C 强粘合界面，在低湿度环境下，这种界面会主导无氢碳基薄膜的摩擦行为，最终导致高摩擦。这项研究表明，WC/a-C 薄膜可以在低湿度条件下实现低摩擦，这是无氢碳基薄膜无法达到的性能。为了阐明低摩擦机理，我们对 a-C、WC/a-C:H 和 WC/a-C 薄膜的摩擦特性进行了比较研究。与碳基薄膜中 "摩擦诱导石墨化 "和 "钝化 "机制这两种流行的润滑假说相反，WC/a-C 薄膜低摩擦的关键因素是建立了一个固有的弱粘性 C/WO3 滑动界面。

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Probing the low friction mechanisms of WC/a-C films under low humidity conditions

Developing a carbonaceous transfer film on the counterpart surface leads to a C/C strong adhesive interface, which dominates the friction behavior of hydrogen-free carbon-based films in low-humidity environments, ultimately resulting in high friction. This research illustrated that WC/a-C films can accomplish low friction under low humidity conditions, a performance not attainable for hydrogen-free carbon-based films. To clarify the low friction mechanisms, a comparative investigation was conducted on the frictional characteristics of a-C, WC/a-C:H, and WC/a-C films. Contrary to two prevalent lubrication hypotheses of ‘friction-induced graphitization’ and ‘passivation’ mechanisms in carbon-based films, the establishment of an intrinsic weakly adhesive C/WO₃ sliding interface was identified as a critical factor contributing to the low friction of WC/a-C films.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.