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In-situ friction and wear responses of WS2 films to space environment: Vacuum and atomic oxygen
Department先进润滑与防护材料研究发展中心
Xu SS(徐书生)1,2; Sun JY(孙嘉奕)1; Weng LJ(翁立军)1; Yong Hua2; Liu WM(刘维民)1; Anne Neville2; Hu M(胡明)1; Gao XM(高晓明)1; Gao XM(高晓明); Hu M(胡明)
The second department固体润滑国家重点实验室
2018
Source PublicationApplied Surface Science
ISSN0169-4332
Volume447Issue:0Pages:368-373
Abstract

The Friction and wear behavior of both sputtered WS2 films with loose or dense microstructures were investigated in vacuum, atomic oxygen (AO) and vacuum/AO irradiation alternate environments. The loose microstructure of pure WS2 film composed of columnar platelets and vertical pores and the dense microstructure showed high compactness. The results revealed that the WS2 films exhibited a periodic fluctuant friction coefficient and high wear under the synchronization action of AO irradiation and friction (in-situ condition). The in-situ results also indicated significantly difference from that of conventional ex-situ methods. As the friction environments were switched from vacuum to in-situ AO, the friction coefficients of the two types of films increased from 0.03 to 0.07 and the wear life of them declined identically to a small value of ~1.1 × 103 cycles, although the wear life of loose WS2 film was up to 1.7 × 104 cycles and that of the dense film was longer than 2.3 × 104 cycles in vacuum. The friction and wear behavior did not depend on the film compactness but the anti-oxidation ability of WS2 itself. For in-situ AO irradiation condition, the high friction resulted from the formation of oxidation product (WO3) by AO and its delamination by frictional interaction was responsible for high wear.

KeywordIn-situ Atomic Oxygen Ws2 Films Friction Wear
Subject Area材料科学与物理化学
DOI10.1016/j.apsusc.2018.04.012
Funding OrganizationChina National Natural Science Foundation (Grant No. 51575508 ; 51505465 ; 51575509 ; 51227804)
Indexed BySCI
If4.439
Language英语
Funding ProjectPVD润滑薄膜研究组 ; 空间润滑材料研究组
compositor第一作者单位
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/22961
Collection固体润滑国家重点实验室(LSL)
中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心
Corresponding AuthorGao XM(高晓明); Hu M(胡明)
Affiliation1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
2.Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK
Recommended Citation
GB/T 7714
Xu SS,Sun JY,Weng LJ,et al. In-situ friction and wear responses of WS2 films to space environment: Vacuum and atomic oxygen[J]. Applied Surface Science,2018,447(0):368-373.
APA Xu SS.,Sun JY.,Weng LJ.,Yong Hua.,Liu WM.,...&Hu M.(2018).In-situ friction and wear responses of WS2 films to space environment: Vacuum and atomic oxygen.Applied Surface Science,447(0),368-373.
MLA Xu SS,et al."In-situ friction and wear responses of WS2 films to space environment: Vacuum and atomic oxygen".Applied Surface Science 447.0(2018):368-373.
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