Research on Atomic Oxygen Erosion Influence of Structural Damage and Tribological Properties of Mo/MoS2-Pb-PbS Thin Film

Materials

Qingsonge Yong¹  Haidou Wang²  Guozheng Ma²  Cuihong Han³  Aobo Wei³  Jiadong Shi³  Guolu Li³  Huipeng Wang⁴  Zhen Li⁵ 

[1] China Aerodynamics Research and Development Center, Mianyang 621000, China;National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China;School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China;School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;State Key Laboratory of Mechanical Systems and Vibrations, Shanghai Jiao Tong University, Shanghai 200240, China;

关键词: atomic oxygen;    Mo/MoS₂-Pb-PbS composite film;    oxide;    lubricating components;   

DOI  :  10.3390/ma15051851

来源: DOAJ

【 摘 要 】

To investigate atomic oxygen effects on tribological properties of Mo/MoS₂-Pb-PbS film and further enlarge application range, atomic oxygen exposure tests were carried out for 5 h, 10 h, 15 h, and 20 h by the atomic oxygen simulator with atomic oxygen flux of 2.5 × 10¹⁵ atoms/cm²·s. The exposure time in test was equivalent to the atomic oxygen cumulative flux for 159.25 h, 318.5 h, 477.75 h, and 637 h at the height of 400 km in space. Then, the vacuum friction test of Mo/MoS₂-Pb-PbS thin film was performed under the 6 N load and 100 r/min. By SEM, TEM, and XPS analysis of the surface of the film after atomic oxygen erosion, it was observed that atomic oxygen could cause serious oxidation on the surface of Mo/MoS₂-Pb-PbS film, and the contents of MoS₂, PbS, and Pb, which were lubricating components, were significantly reduced, and oxides were generated. From AES analysis and the variation in the main element content, Mo/MoS₂-Pb-PbS thin film showed self-protection ability in an atomic oxygen environment. Hard oxide generated after atomic oxygen erosion such as MoO₃ and Pb₃O₄ could cause the friction coefficient slight fluctuations, but the average friction coefficient was in a stable state.

【 授权许可】

Unknown