Improving the Properties of HVOF- Sprayed Cr₂O₃ by Nanocomposite Powders

Superior wear performance combined with excellent friction properties against metals makes chromium oxide (Cr₂O₃) an interesting coating material for many industrial applications. However, Cr₂O₃ is a challenging material for HVOF spraying due to its high melting temperature. Fracture toughness and lamella cohesion of a coating is limited and may be improved by using ceramic-ceramic –nanocomposite powders, which forms phases with improved properties. In this study Cr₂O₃-TiO₂ systems were selected aiming to improve the toughness and lamella cohesion of coating without reducing the excellent wear properties.