Effect of current density on the structure and tribological properties of WS2 reinforced Ni-P metal matrix composite coating produced by electrodeposition

Abstract

2D (two-dimensional) materials have been the focus of recent material science studies. These materials are generally lamellated. Due to these physiological properties, they act as solid lubricants as antiwear in parts operating under a certain load. In this study, WS2 particles of 1 micron size were added to the Ni-P bath and Ni-P-WS2 composite coatings were produced at different current densities at the same concentration. The aim of this study is to obtain Ni-P metal matrix composites reinforced with WS2 particles on steel surfaces with high hardness and wear resistance for parts working under intense load in automobiles and aerospace vehicles and for use in anti-wear applications. In the study, WS2 particles were added to the bath at a concentration of 0.1 g/L and 3 coatings were produced at current densities of 13 A/dm2 , 20 A/dm2 , 26 A/dm2 respectively. The effects of different current densities applied during the deposition process on particle distribution, hardness and wear resistance were investigated. During the electroplating process, a suitable stirring speed and a certain temperature were kept constant for the deposition of WS2 particles on the Ni-P matrix. The produced films were characterised by scanning electron microscopy (SEM) and Xray diffraction (XRD) analysis.