Tribology of WC-Co coatings in sliding and rolling contacts

Activity: Talk or presentationPublic lecture

Description

Almost 23% of the world’s total energy consumption originates from tribological contacts. Thermal spray WC-Co coatings provide excellent wear resistance for a range of industrial applications in sliding or rolling contacts. Some of these applications in abrasive, sliding and erosive conditions include sink rolls in zinc pots, conveyor screws, pump housings, Impeller shafts, aircraft flap tracks, cam followers, and expansion joints. In this webinar Rehan provided an expert review of the tribological considerations dictating the wear performance of these coatings. Structure-property relationship and failure modes are discussed to comprehend the design aspects of WC-Co coatings for sliding and rolling applications. Recent developments in the area of suspension sprayed nanocomposite coatings in terms of performance and failure mechanism are compared with conventional coatings. The dependency of binder material, carbide size, fracture toughness and hardness on wear performance and test methodology is discussed. Mathematical models related to the influence of tribological test conditions and coating characteristics are analysed for sliding contacts. Maps of failure modes in rolling contact are included to clarify the interplay between coating design and tribological considerations of contact stress and lubrication regime. Finally, some recent developments in the area of numerical modelling of the wear phenomena are included.
Period30 Sep 2020
Held atAustralian Research Council (ARC) Industrial Transformation Training Centre in Surface Engineering for Advanced Materials (SEAM)
Degree of RecognitionInternational