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Friction and Wear Behavior of Self-lubricating La-Ti/WS2 Films by Unbalanced Magnetron Sputtering
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1.School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China;2.Luoyang Bearing Research Institute Co., Ltd, Luoyang 471039, China;3.Henan Key Laboratory for Machinery Design and Transmission System, Henan University of Science and Technology, Luoyang 471003, China

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National Defense Industrial Technology Development Program (JCKY2018419C101); Project of Science and Technology Development of Henan Province (202102210073); Program of Science and Technology of Luoyang City (1901016A)

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    Abstract:

    The solid lubrication films with high hardness and low friction coefficient should be developed to satisfy the severe working conditions of mechanical rotating parts of spacecraft. The pure WS2 film, Ti doped WS2 composite film (Ti/WS2) and La-Ti doped WS2 composite film (La-Ti/WS2) were prepared by unbalanced magnetron sputtering. The micro morphology, composition, hardness and tribological performance of the films were examined. Results show that compared with pure WS2 films and Ti/WS2 composite films, the microstructure of La-Ti/WS2 composite film becomes more compact. Meanwhile, the hardness and elastic modulus of La-Ti/WS2 composite film also increase significantly. Furthermore, the friction coefficient of La-Ti/WS2 composite film decreases, and the hardness/elastic modulus (H/E) ratio of La-Ti/WS2 composite film increases, which suggests that the wear rate of La-Ti/WS2 composite film is reduced. It is indicated that La doping contributes to the formation of stable transfer film on the friction contact surface, and thus improves the wear resistance and carrying capacity of La-Ti/WS2 composite film.

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[Cai Haichao, Xue Yujun, Li Hang, Ye Jun, Wang Jinghua. Friction and Wear Behavior of Self-lubricating La-Ti/WS2 Films by Unbalanced Magnetron Sputtering[J]. Rare Metal Materials and Engineering,2021,50(8):2708~2714.]
DOI:10.12442/j. issn.1002-185X.20200431

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History
  • Received:June 18,2020
  • Revised:August 20,2020
  • Adopted:August 28,2020
  • Online: September 07,2021
  • Published: August 31,2021