期刊
SURFACE AND INTERFACE ANALYSIS
卷 51, 期 3, 页码 361-370出版社
WILEY
DOI: 10.1002/sia.6588
关键词
diamond-like carbon; dry friction; lubrication mechanism; oil lubrication; Ti doped; transfer film
资金
- National Natural Science Foundation of China [51522106, 51601211]
- Zhejiang Key Research and Development Program [2017C01001]
- Chinese Academy of Sciences President's International Fellowship Initiative [2018VEA0007]
- National Key R&D Program of China [2017YFB0702303]
Titanium-doped diamond-like carbon (Ti-DLC) coatings with Ti concentration of 4 at.% (Ti-4at.%-DLC) and 27 at.% (Ti-27at.%-DLC) were prepared by a hybrid ion beam deposition system for comparison. The tribological behaviors of Ti-DLC coatings under dry friction and boundary lubrication conditions were systematically investigated. Results showed that, under dry friction, the Ti-4at.%-DLC coating displayed lower friction coefficient (0.07) and wear rate due to the continuous transfer film formed in the sliding interface, while Ti-27at.%-DLC coating was worn out at initial stage due to severe abrasive wear. And under boundary lubrication, both the Ti-4at.%-DLC and Ti-27at.%-DLC coatings showed excellent tribological properties attributing to the formation of oil film between sliding interface. In particular, Ti-27at.%-DLC performed the lowest wear rate of 1.12 x 10(-16) m(3) N-1 m(-1) in this friction case. In conclusion, compared with Ti-27at.%-DLC coating, Ti-4at.%-DLC coating exhibited better tribological performances both under dry friction and boundary lubrication. The present result provides guidance for the selection of DLC coatings according to the realistic environment of starved-oil and rich-oil conditions.
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