Title: Tribological behaviour and characterisation of Ni-WS2 composite coating

Authors: Rahul Saini; Debanshu Roy; A.K. Das; A.R. Dixit; Ganesh Chandra Nayak

Addresses: Centre Excellence: Nanotechnology, Indian Institute of Technology Roorkee, Roorkee-247667, India ' Department of Mechanical Engineering, Meghnad Saha Institute of Technology (MSIT), West Bengal-700142, India ' Department of Mechanical Engineering, Indian School of Mines, Dhanbad, Dhanbad-826004, Jharkhand, India ' Department of Mechanical Engineering, Indian School of Mines, Dhanbad, Dhanbad-826004, Jharkhand, India ' Department of Applied Chemistry, Indian School of Mines, Dhanbad, Jharkhand, 826004, India

Abstract: WS2 particulates were incorporated in the Nickel matrix through electro deposition process, to obtain a composite coating with improved tribological properties. EN31 steel was used as the work piece for the electro deposition process. Different characterisation processes, such as, microstructure examination, XRD analysis, wear and friction behaviour of the coated surface were carried out. The experimental results indicates that uniform Ni-WS2 composite coating with minimum cracks can be obtained with the current density of 10 mA/cm², bath temperature of 40°C, pH level of 04 and WS2 particle concentration of 30 g/l; the coefficient of friction is reduced from 0.8 to 0.4 with the incorporation of WS2 particulates in the Nickel matrix as compared to the parent surface.

Keywords: tungsten disulphide; nickel; solid lubricants; electrodeposition; composite coatings; WS2 particulates; wear; tribology; microstructure; friction; Ni-WS2 coatings.

DOI: 10.1504/IJSURFSE.2016.076994

International Journal of Surface Science and Engineering, 2016 Vol.10 No.3, pp.240 - 252

Received: 26 Aug 2014
Accepted: 26 Feb 2015

Published online: 17 Jun 2016 *

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