Plasma current effects on the microstructure of solution precursor plasma spray YSZ coatings

Abstract

The Solution Precursor Plasma Spray (SPPS) process has been used for obtaining Zirconia coatings as Thermal Barrier Coatings (TBCs). In this study an in house developed Zirconyle nitratesolution precursor plasma spray setup has been used. In this process the coating is built up by horizontal and vertical passes of the plasma torch across the substrate. The microstructural characterizations of coatings were carried out by scanning electron microscope (SEM) and X-ray diffraction (XRD). Significant effect of plasma current has been observed on the zirconia coatings.