Open AccessFriction Performance and Mechanism of the Molybdenum Disulfide Film in Carbon Dioxide Atmosphere
Author(s) -
Shibo Chen,
Lei Huo,
Zhaoxia Lu,
Jibin Pu,
Baorong Hou
Publication year - 2020
Publication title -
ecs journal of solid state science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.488
H-Index - 51
eISSN - 2162-8777
pISSN - 2162-8769
DOI - 10.1149/2162-8777/ab96aa
Subject(s) - materials science , carbon dioxide , molybdenum disulfide , atmosphere (unit) , sputtering , adsorption , chemisorption , tribology , carbon dioxide in earth's atmosphere , carbon fibers , deposition (geology) , molybdenum , molecule , friction coefficient , chemical engineering , composite material , nanotechnology , thin film , metallurgy , organic chemistry , chemistry , thermodynamics , paleontology , physics , sediment , biology , composite number , engineering
In this work, the tribological properties of MoS 2 films were investigated in air, vacuum and carbon dioxide environments by means of experiments and First-principles calculations. The results showed that the MoS 2 film had the lowest and more stable coefficient of friction in carbon dioxide atmosphere than that in other environments. The MoS 2 film usually loses some S atoms to produce S-vacancy defects during sputtering deposition, which can be filled by carbon dioxide molecules in a way of chemisorption. The strong repulsive force always existed at the interfaces of MoS 2 adsorbed with carbon dioxide molecules, which was responsible for the low friction coefficient of MoS 2 films in carbon dioxide. In the future, the MoS 2 film is likely to be widely used on Mars that is well known for its CO 2 -rich atmosphere.
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