Temperature dependence of tribological properties of MoS2 and MoSe2 coatings

These results show that the friction coefficient of MoSe2 was not influenced by air humidity. Wear rate of MoSe2 in dry air was substantially higher than that of MoS2; in humid air, the MoS2 wear rate increased rapidly while wear rate of MoSe2 remained unchanged. The operating temperature of both coatings was limited to 350 °C.