Reddy, G.M.S.Prasad, C.D.Patil, P.Shetty, G.K.Kakur, N.Ramesh, M.R.2026-02-042023International Journal of Surface Science and Engineering, 2023, 17, 3, pp. 180-1941749785Xhttps://doi.org/10.1504/IJSURFSE.2023.134785https://idr.nitk.ac.in/handle/123456789/21617The purpose of the current study was to use an air jet erosion tester to examine the erosive behaviour of plasma sprayed coatings on MDN-420 that were composed of 70% NiCrAlY, 25% Cr2O3, and 5% YSZ. Microstructure and phase studies were performed. Measurements were made on the microhardness and adhesion strength. Al2O3 erodent was used in a solid particle erosion test with impact angles of 30° and 90° at 300°C, 500°C, and 700°C. The erosion volume loss was measured using an optical profilometer. For the test temperature used, it was found that the coating’s erosion resistance was greater than that of the substrate and that it was more pronounced at higher impact angles and higher temperatures. The shape of the degraded coating surface reflects the coating’s ductile nature. © © 2023 Inderscience Enterprises Ltd.AluminaAluminum oxideChromium alloysPlasma jetsPlasma sprayingSprayed coatingsYttria stabilized zirconia'currentAir jetCoating(s)Highest temperatureMDN-420 alloyNiCrAlY/cr2o3/YSZPerformancePlasma coatingPlasma sprayPlasma-sprayed coatingsErosion