Investigation of the Tribological Properties of MoS2/Ni Composite Coatings Produced by Magnetron Sputtering

مهندسی متالورژی و مواد

Article 3, Volume 31, Issue 2 - Serial Number 22, September 2020, Pages 25-34   

Document Type: Original Articles

DOI: 10.22067/ma.v31i2.68157

Authors

Mehdi Akbarzadeh^{* 1}; Morteza Zandrahimi¹; Ehsan Moradpur²

¹Department of Metallurgy and Materials science, Faculty of Engineering,

²tehran

Abstract

In this study Ni-MoS2 composite coatings were deposited onto steel substrates by direct-current magnetron sputtering. The MoS2/Ni ratio in the coatings was controlled by sputtering the composite targets. The coatings were characterized X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and nano-indentation and nano-scratch testes. The tribological behavior of the coatings were investigated using the pin-on-disc test at room temperature. The results showed that the thickness, and the hardness of the coatings were 4-6 µm and 850-1300 HV, respectively. The degree of crystallization of the composite coatings increased with increasing Nickel contents. The incorporation of Nickel to MoS2 coatings resulted in a considerable improvement of coating adhesion and hardness. The optimum doping level for Ni-MoSx coatings to show the best tribological properties,) the lowest friction coefficient and wear rate (was 14 atomic percent. The main wear mechanism of coating were delamination and tribochemical.

Keywords

Keywords: Molybdenum disulfide; Solid lubricant; Physical vapor deposition. Wear behavior; Friction coefficient

Supplementary Files

3-zandrahimi-Revised.pdf

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