Title of article :
Effect of Substrate Bias Voltage and Ti Doping on the Tribological Properties of DC Magnetron Sputtered MoSx Coatings
Author/Authors :
Akbarzadeh, M Department of Metallurgy - Faculty of Engineering - Shahid Bahonar University of Kerman - Kerman, Iran , Zandrahimi, M Department of Metallurgy - Faculty of Engineering - Shahid Bahonar University of Kerman - Kerman, Iran , Moradpour, E Department of Materials Engineering - Faculty of Engineering - Tarbiat Modares University - Tehran, Iran
Abstract :
Molybdenum disulde (MoS2) is one of the most widely used solid lubricants. In this work, composite
MoSx/Ti coatings were deposited by direct-current magnetron sputter ion plating onto plain carbon steel substrates.
The MoSx/Ti ratio in the coatings was controlled by sputtering the composite targets. The composition,
microstructure, and mechanical properties of the coatings were explored using an energy dispersive analysis
of X-ray (EDX), X-ray diffraction (XRD), nanoindentation and scratch techniques. The tribological behavior
of the coatings was investigated using the pin-on-disc test at room temperature. With the increase of doped
titanium content, the crystallization degree of the MoSx/Ti composite coatings decreased. The MoSx/Ti coatings
showed a maximum hardness of 13 GPa at a dopant content of 5 at.% Ti and the MoSx/Ti composite lms outperformed
the MoSx lms. Moreover, the lms exhibited a steady state friction coefcient from 0.13 to 0.19 and
the main wear mechanisms of the MoSx/Ti coating in the air were abrasive, adhesive, and oxidation wear
Keywords :
Solid lubricant , Low friction , PVD , Tribological properties , MoSX/Ti coating
Journal title :
Astroparticle Physics
