Wet Sliding Wear Investigation of Ni-Based Coating for Piston Cylinder

Abstract

This paper presents the investigation of sliding wear of nickel-based coatings for piston cylinder application. Wear and friction between cylinder walls and pistons is a critical issue in industries like power generation, aerospace, and nuclear plants, contributing significantly to engine losses. NiCrBSiFeC has been coated on steel by high velocity oxy fuel thermal process and investigated on tribometer for sliding wear as per ASTM G99 standard. The design of experiments was done by considering normal load, speed and track diameter as variable with three level.  The wear tracks are analyzed using electro discharge spectrum (EDS) analysis and scanning electron microscope (SEM) images. The specific Mass Wear Rate (MWR) and coefficient of frictions are compared for coated and uncoated conditions. The results indicated the significant improvement in the wear life for the coated sample with mild abrasive and delaminated wear mechanism.