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The antioxygen radiation properties of the nanocomposite film consisted of hydrogenated amorphous carbon (a‐C:H) and MoS 2
Author(s) -
Zheng Ke,
Liu Yunlin,
Li Hongxuan,
Liu Ying,
Yu Shengwang,
Zhou Bing,
Wu Yanxia,
Tang Bin
Publication year - 2020
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6769
Subject(s) - materials science , lubricant , tribology , nanocomposite , composite number , composite material , amorphous solid , radiation , carbon fibers , amorphous carbon , optics , crystallography , chemistry , physics
MoS 2 /a‐C:H multilayer film and MoS 2 /a‐C:H composite film exhibit excellent tribological properties in vacuum, which can be used as the potential space lubricant. The radiation‐protective properties of these two films in atomic oxygen (AO) are evaluated. The influences of AO radiation on structure, morphology, and tribological properties of the films were investigated. The results show that AO radiation mainly causes oxidation and increases sp 2 C content in both of the films. Furthermore, the MoS 2 sublayer on the surface of the multilayer film is oxidized heavily, whereas both the MoS 2 and the a‐C:H matrix on the surface were oxidized in the composite film. As a result of this, the multilayer film exhibits high friction coefficient and short sliding lifetime in vacuum after AO radiation. Compared with that, the composite film exhibits lower friction and longer sliding time more than 3600 seconds in vacuum, which illustrates it has a good AO radiation protection. This indicates that MoS 2 /a‐C:H composite film is more likely to be used as a potential space lubricant.