Friction and wear properties of GLC and DLC coatings under ionic liquid lubrication. (March 2020)

• Record Type: Journal Article
• Authors: Yan, Mingming; Wang, Xinyu; Zhang, Songwei; Zhang, Shuaituo; Sui, Xudong; Li, Wensheng; Hao, Junying; Liu, Weimin
• Is Part Of: Tribology international. Volume 143(2020)
• Publication Date: 2020-03
• Subjects: Cr-GLC -- Cr-DLC -- Synergistic lubrication -- Tribological behaviour; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2019.106067
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Cr-doped graphite-like carbon (Cr-GLC) coatings and Cr-doped diamond-like carbon (Cr-DLC) coatings were prepared by PVD and PECVD, respectively. The lubrication behaviour of the solid-liquid composite lubrication systems was investigated using two ionic liquids (ILs) as lubricants. The results show that the friction coefficient was reduced by approximately 40% compared with that under the dry condition, and the composite system exhibited a good synergistic lubrication effect. The Cr-DLC coating showed better tribological behaviour than the Cr-GLC coating, which can be ascribed to a better physicochemical film formation under friction and the compact microstructure of the Cr-DLC coating. The synergistic effect of the composite systems was affected by the viscosity and corrosiveness of the ILs and the microstructure of the coatings. Graphical abstract: Image 1 Highlights: The Cr-GLC and Cr-DLC coatings were prepared by PVD and PECVD method, respectively. The friction coefficient decreases from 0.11 (dry condition) to 0.045–0.06 (ILs condition). The lubrication of solid-liquid systems is mainly affected by the wettability of ionic liquids. The tribological properties of Cr-GLC in ionic liquids are more affected by the corrosion effect.