The effect of temperature on water desorption and oxide formation in MoS2 coatings and its impact on tribological properties

Molybdenum disulfide (MoS2) is used extensively in aerospace applications, where liquid lubricants are not suitable. MoS2 has excellent tribological properties vacuum, however, further research required to fully understand the mechanisms taking place when exposed varying temperatures ambient atmosphere due storage and on-ground testing. coatings were deposited on AISI 440C steel substrates, friction wear tests conducted at increasing temperatures, up 75 °C, determining effect of temperature air. It was found that detected surface oxides do impact around °C. The water molecules room hinder alignment layers leaving some active edge sites contacting surfaces, leading high wear. Desorption promote parallel layers, reducing shear strength,