Sliding Wear of Conventional and Suspension Sprayed Nanocomposite WC-Co Coatings: An Invited Review

Abstract The global thermal spray coatings market was valued at USD 10.1 billion in 2019 and is expected to grow a compound annual growth rate of 3.9% from 2020 2027. Carbide form an essential segment this provide cost-effective environmental friendly tribological solutions for applications aerospace, industrial gas turbine, automotive, printing, oil gas, steel, pulp paper industries. Almost 23% the world’s total energy consumption originates contacts. Thermal WC-Co excellent wear resistance sliding rolling Some these abrasive, erosive conditions include sink rolls zinc pots, conveyor screws, pump housings, impeller shafts, aircraft flap tracks, cam followers expansion joints. These are considered as replacement hazardous chrome plating applications. microstructure however complex, mechanisms rates vary significantly when compared cemented carbides or vapour deposition WC coatings. This provides expert review considerations that dictate performance Structure–property relationships failure modes discussed grasp design aspects Recent developments suspension sprayed nanocomposite with conventional terms mechanisms. dependency coating microstructure, binder material, carbide size, fracture toughness, post-treatment hardness on test methodology discussed. Semiempirical mathematical models related influence characteristics analysed Finally, advances numerical modelling