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

Akbarzadeh, Mehdi; Zandrahimi, Morteza; Moradpur, Ehsan

doi:10.22067/ma.v31i2.68157

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

Document Type : Original Articles

Authors

Mehdi Akbarzadeh ¹

Morteza Zandrahimi ¹

Ehsan Moradpur ²

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

² tehran

10.22067/ma.v31i2.68157

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

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