The Study of Wear Behaviour of Alumina-Titania Composite Coating Produced by Plasma Spraying Technique

Wear and erosion are the main reasons for destruction of many industrial components. In many cases، ceramic coatings produced by plasma spraying technique improve wear and erosion performance of industrial components. In this study، it was attempted to design and prepare an optimized composite coating of Alumina-Titania via plasma spraying technique using various parameters of plasma input power، and to study the influence of morphology، microhardness and elastic properties of prepared coatings on their erosion behaviour. Characterization of prepared coatings was performed using X-ray diffraction (XRD) technique and scanning electron microscope (SEM). The elastic properties of coatings and the porosity and gamma alumina phase in their structure were also investigated. Vickers hardness test was performed in order to measure the microhardness of coatings. The results showed that the elastic properties have the greatest influence on the erosion performance of coatings. It was also shown that the input power of 28 kW causes an increase in both the microhardness and elastic properties of coatings simultaneously.