TRIBOLOGICAL BEHAVIOUR OF CERAMIC COATING

Titania or titanium di-Oxide (TiO2) is a multi-functional ceramic material having many potential applications, such as medical technology, photo catalysis and wear protection. In this study, Titania and TiO2+10% SiC coating was deposited on titanium substrate by High Velocity Oxy-Fuel (HVOF) spraying. The Microhardness and porosity of the coatings was measured using Vickers microhardness tester on coating cross section and bond strength was measured as per ASTM C633. The XRD analysis identifies the rutile as major phase and presence of secondary phases in TiO2-SiC coating. The sliding wear behavior of substrate, coatings was evaluated using Pin-on-disk apparatus as per ASTM G99 standard. Worn surface morphologies were analysed by SEM and found that the major wear mechanisms are plastic deformation, brittle fracture and micro cutting.