Abstract
MoS2-based films are the most widely used solid lubrication materials in the space environment. However, the environmental sensitivity of MoS2 determines its low lifetime in low-orbit space environments rich in atomic oxygen (AO). To solve this problem, we optimize the film structure by doping with LaF3, which has a hexagonal structure and grain refinement properties. The TEM-FIB cross-section visualization illustrates that the LaF3 doping can further reduce the voids in the film and improve densification, which improves the AO-resistance of the film and maintains excellent tribological properties with a low friction coefficient of 0.017 and a friction life of more than 1.5 x 10(6) laps after high-flux AO irradiation.
Keywords Plus：TRIBOLOGICAL PROPERTIES，COMPOSITE COATINGS，BEHAVIOR，MICROSTRUCTURE，CR
Published in TRIBOLOGY INTERNATIONAL，Volume192，10.1016/j.triboint.2024.109259；APR 2024