Temperature dependence of tribological properties of MoS2 and MoSe2 coatings

By T. Kubart, T. Polcar, L. Kopecký, R. Novak, D. Nováková. 2005

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Tribological behaviour of self-lubricating materials at high temperatures (2018, background): “improvements in wear rates compared to those measured at RT have only been reported for pure MoS2 thin film coatings [61], which on the other hand have important drawbacks such as being prone to early failure at temperatures of 300°C [22].”
The Effects of Environmental Water and Oxygen on the Temperature-Dependent Friction of Sputtered Molybdenum Disulfide (2013, background): “and oxidation studies report that oxidation only occurs above a transition temperature that ranges from 100 to 500 C [1, 3, 24, 25, 27, 28]; Windom et al.”
Solid Lubrication with MoS2: A Review (2019, methodology): “above the transition temperature defined in Section 5), friction increases with increasing temperature; under ambient conditions this is due to increasing oxidation rates, whereas the thermal dissociation rates of MoS2 rapidly increase in inert gas or vacuum environments at temperatures above 500 °C”