Effect of Cerium on Microstructure and Friction of MoS_2 Coating

摘要

The MoS_2 coatings with different Cerium contents (0.5%, 1%, 2%, 4%) were prepared based on the titanium alloy (Ti811) by a mixing method. The surface microstructure and metallographic structure of the MoS_2 coatings were characterized by scanning electron microscopy (SEM). And the friction coefficient and wear texture were analyzed of four kinds of MoS_2 coating layer. The results have shown the increase of Cerium content can refine the microstructure of the MoS_2 coating, thereby inhibiting the growth of the crystal grains, improving the wear resistance, and lower the friction coefficient. The minimum friction coefficient is 0.055 at the Ce (1%). With the increase of Ce content, hydrogenation occurs, resulting in the crystallization of the MoS_2 coating, which reduces the friction coefficient and affects the wear resistance.