期刊
CERAMICS INTERNATIONAL
卷 47, 期 12, 页码 16861-16869出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.02.261
关键词
WC/a-C nano-multilayers; Modulation ratio; Mechanical properties; Tribological properties
资金
- National Natural Science Foundation of China [51905244, 52075234]
- program of Science and Technology International Cooperation Demonstrative Base of Metal Surface Engineering along the Silk Road of China [2017D01003]
- Hongliu Distinguished Young Talent Support Program of Lanzhou University of Technology, China
The study investigated the mechanical and tribological performance of WC/a-C nano-multilayers with different modulation ratios, and found that the best overall properties were achieved at a modulation ratio of 1:1.2. The enhanced tribological properties were attributed to the friction-induced formation of a WO3-rich transfer film under an appropriate WC individual layer thickness, which helped in constructing an intrinsically weak-interacting sliding interface. Additionally, graphitized carbon played a crucial role in the formation of the WO3-rich transfer film.
WC/a-C nano-multilayers with different modulation ratio (WC:a-C) ranging from 1:10 to 1.5:1 were deposited by fixing a-C individual layer thickness and tailoring WC individual layer thickness. The effect of modulation ratio on mechanical and tribological performance of WC/a-C nano-multilayers were investigated. Superior mechanical and tribological properties were simultaneously achieved at modulation ratio of 1:1.2. In addition to the improvement of mechanical properties, the improved tribological properties should also be attributed to the friction-induced formation of a WO3-rich transfer film under an appropriate WC individual layer thickness, which combing the graphitized worn film surface constructed an intrinsically weak-interacting sliding interface (WO3/C interface). Also, graphitized carbon is an essential coadjutant for the formation of WO3-rich transfer film.
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