Effect of Substrate Bias Voltage and Ti Doping on the Tribological Properties   of DC Magnetron Sputtered MoSx Coatings‌

Akbarzadeh, M.; Zandrahimi, M.; Moradpur, E.

doi:10.22068/ijmse.16.2.10

Volume 16, Issue 2 (June 2019) IJMSE 2019, 16(2): 10-20 | Back to browse issues page

‎ 10.22068/ijmse.16.2.10

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Akbarzadeh M, Zandrahimi M, Moradpur E. Effect of Substrate Bias Voltage and Ti Doping on the Tribological Properties of DC Magnetron Sputtered MoSx Coatings‌. IJMSE 2019; 16 (2) :10-20
URL: http://ijmse.iust.ac.ir/article-1-1221-en.html

Effect of Substrate Bias Voltage and Ti Doping on the Tribological Properties of DC Magnetron Sputtered MoSx Coatings‌

M. Akbarzadeh

, M. Zandrahimi

, E. Moradpur

Abstract: (14794 Views)

Molybdenum disulfide (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), Xray diffraction (XRD), and nano indentation 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 films outperformed the MoSx films. Moreover, the films exhibited a steady state friction coefficient from 0.13 to 0.19 and the main wear mechanisms of the MoSx/Ti coating in air were abrasive, adhesive, and oxidation wear.

Keywords: MoSX/Ti coating, tribological properties, low friction, PVD