The influence of the deposition pressure on the composition and the mechanical properties of W–S–C coatings deposited by magnetron sputtering in semi-industrial conditions

Self-lubricant W–S–C coatings with optimized composition possess a unique ability to provide a reduction of friction and wear in numerous operating conditions. In this study, W–S–C coatings are deposited by magnetron sputtering at different pressures, in semi-industrial conditions. The composition and tribo-mechanical properties are studied. The deposition pressure affected the carbon content of the coatings and, more importantly, the S/W ratio. Increasing the deposition pressure enhances the importance of the scattering behavior of the sputtered species. The tribological response was closely related to the S/W ratio, with better performance for higher S/W ratios. For industrialization of the W–S–C coatings, deposition at longer target-to-substrate distances is favorable.