Microstructures and Functional Properties of Al₂O₃ and TiO₂ Suspension Sprayed Coatings: An Overview

This paper describes the properties and behaviors of alumina and titania coatings that have recently been produced using suspension spraying techniques. It examines coating microstructures and phase compositions are shows how they are influenced by different operating parameters and interactions. A selection of new experimental results obtained by the authors is also presented. In the case of Al₂O₃, the goal was to retain a high ratio of the thermodynamically stable α-phase. In the case of TiO₂, the spraying process was optimized to preserve the anatase phase in order to obtain photocatalytically active layers.