Influence of WS2 Nanopowder Addition on Friction Characteristics of ta-C Coating by FCVA Method

Title
Influence of WS2 Nanopowder Addition on Friction Characteristics of ta-C Coating by FCVA Method
Author(s)
Si-Geun Choi[Si-Geun Choi]Yong-Joong Lee[Yong-Joong Lee]Young-Jun Jang[Young-Jun Jang]다윗제네베세구Seock-Sam Kim[Seock-Sam Kim]Ji-Hyun Sung[Ji-Hyun Sung]Jae-Wook Lee[Jae-Wook Lee]Jong-Hyoung Kim[Jong-Hyoung Kim]
Keywords
AMORPHOUS-CARBON FILMS; ELEVATED-TEMPERATURES; OIL; REDUCTION
Issue Date
201507
Publisher
HINDAWI PUBLISHING CORPORATION
Citation
JOURNAL OF NANOMATERIALS
Abstract
The influence of nano-size WS2 powders on the tribological behavior of ta-C coatings by the filtered cathodic vacuum arc (FCVA) method under boundary lubrication conditions has been investigated. In order to characterize and understand tribological behaviors of nano-size WS2 powders added to the synthetic oil (poly-alpha-olefin 6), lubricants with different mixture ratios, ranging from 2 to 8 wt%, have been prepared. ta-C coatings fabricated by FCVA method showed that the G-peak in the obtained Raman spectrum was shifted from 1520 to 1586 cm(-1), indicating the sp(3) content increased for samples with the thickness of 156 nm. The average friction coefficient decreased proportionally as the nano-size WS2 compositions increased up to 4 wt% in PAO6. After the friction test, structures and particle sizes of WS2 phases were also precisely characterized by using XRD and SEM.
URI
http://hdl.handle.net/YU.REPOSITORY/31691http://dx.doi.org/10.1155/2015/983505
ISSN
1687-4110
Appears in Collections:
공과대학 > 기계공학부 > Articles
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