Deposition and characterization of alumina–titania coating by multi-chamber gas-dynamic sprayer

Abstract

In this paper, alumina–titania coatings have been formed on aluminium substrate by multi-chamber detonation sprayer. The coatings were investigated using SEM, EDS, XRD and Vickers microhardness tester. The results show that the alumina–titania coatings consist of both fully melted regions and partially melted regions, and the fully melted region has a lamellar-like structure. The multi-chamber detonation sprayer produced the dense layers of coating with a high hardness.

Keywords

• Alumina–titania coatings
• Multi-chamber detonation sprayer
• Microstructure