Effect of Working Pressure on Tribological Properties of Ce-Ti/MoS2 Coatings Using Magnetron Sputter

Abstract

In preparing MoS2-based coatings by magnetron sputtering, the working pressure of the vacuum chamber directly affects the number and kinetic energy of sputtering particles, which causes a difference in coatings structure and performance. In this paper, MoS2 composite coatings with Ce and Ti binary doping were prepared by unbalanced magnetron sputtering technology, and the variation of composition, structure, and tribological properties of Ce-Ti/MoS2 coatings under different working pressures was studied. The results demonstrated that Ce and Ti doping improves pure MoS2 coatings. The Ce-Ti/MoS2 coatings reached the hardness of 9.02 GPa and the friction coefficient of 0.065 when working pressure was at 0.6 Pa. It was also observed that the deposition efficiency and wear rate reached the optimal value at 0.9 Pa. With the increase of working pressure, the columnar structure of the coating was coarse due to the change of kinetic energy and quantity of particles in the chamber. The intensity of the MoS2 (002) diffraction peak decreased, which eventually led to a poor lubrication effect and aggravated wear. This study provides technical guidance for preparing metal-doped MoS2 composite coatings with excellent mechanical and tribological properties.

Investigation of Hydrogen Production Performance Using Nanoporous NiCr and NiV Alloys in KBH4 Hydrolysis

“…Depending on the working conditions of the coating process, the material to be used as a target can be coated on any surface via the magnetron-sputtering process. Coatings made via the magnetron-sputtering technique are columnar and porous [34,42]. Section and surface images of the prepared thin-film catalysts under FE-SEM are shown in Figure 2.…”

Effect of deposition pressure on friction and wear properties of BWS2 composite coatings

“…To address this issue, scholars have discovered that doping WS 2 coatings with metal [7][8][9][10][11], non-metal elements, and compounds [12], as well as adjusting the process parameters of coating preparation, can enhance the mechanical and tribological properties of WS 2 coatings. Scharf improved the high-temperature resistance of the WS 2 coating by doping it with Ti to form a Ti-WS 2 solid lubricating coating.…”