High temperature characterization of electroless tribological coatings

Abstract

The aim of this M.Tech project is to develop a lubricative coating via an electroless method that can withstand its properties at higher temperatures. Wear and scratching reduce the lifespan of the components significantly. Coating applied on the substrate improves the service life. Electroless plating can create nickelbased protective coatings with excellent mechanical and tribological properties. Among the different compositions explored over the years, borohydride reduced electro less nickel coatings have shown a lot of promise in a variety of technological applications. Hardness, wear res istance, corrosion resistance, and other phys ical qualities of binary Ni-B electro less coatings are improved by adding tungsten (W) to the matrix. Hexagonal-boron nitride (hBN) is a so lid lubricant that can sustain lubricity at extremely high temperatures. Our research focuses on the use of hBN in Ni-B based electroless tribological coatings. When Ni-B-W-hBN is heat treated, it shows a considerable improvement in sliding wear and scratch resistance when compared to other coating s.