Investigation of Microstructure and Mechanical Properties of Alumina-Titania Coatings by Flexicord Flame Spraying

Thermally sprayed Al₂O₃-TiO₂ coatings were in the area of interest over the last decade because they showed improved wear properties over conventional coatings. In this study, flexicord flame spray gun was used to deposit Al₂O₃-TiO₂ coatings at different spray parameters. The microstructural morphology variation and phase transformation of coatings were investigated. In addition, as one of the most important properties for ceramic coatings, hardness, solid particle abrasive wear resistance of coatings were measured before and after heat treated condition. Test results show that the higher mechanical properties and wear resistance by the heat treatment at elevated temperatures.