Nanomechanical and nanotribological properties of self-lubricating Ti/MoS₂ nanocoating at nanoscale level
by Summera Banday; M.F. Wani
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 14, No. 2, 2020

Abstract: Ti/MoS₂ coating of thickness 99.79 nm was prepared by pulse laser deposition method on Al-Si substrate. Mechanical and nanotribological properties of Ti/MoS₂ coating were obtained by carrying out nanoindentation, nanoscratch and nanowear tests at low loads. It was observed that Young's modulus and nanohardness of Ti/MoS₂ coating decrease with increasing load. The coefficient of friction also decreases with the increase in sliding distance, which proves that Ti/MoS₂ coating have self-lubricating property. The wear rate of Ti/MoS₂ coating increases from 5.7 × 10⁻¹⁰ mm³/Nm to 2.1 × 10⁻⁹ mm³/Nm with the increase in load. Scanning probe microscope images of Ti/MoS₂ coating shows the plastic flow of coating with no debris and cracks on the surface. It indicates that the abrasive wear is the main wear mechanism.

Online publication date: Mon, 06-Jul-2020

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