Reddy, G.M.S.Prasad, C.D.Shetty, G.Ramesh, M.R.Rao, T.N.Patil, P.2026-02-042022Welding in the World, 2022, 66, 6, pp. 1069-1079432288https://doi.org/10.1007/s40194-022-01268-7https://idr.nitk.ac.in/handle/123456789/22562The 70% NiCrAlY + 30% TiO<inf>2</inf> and 70% NiCrAlY + 25% Cr<inf>2</inf>O<inf>3</inf> + 5% YSZ metallic coatings are sprayed on titanium-15 alloy of ASTM B338, Grade 2, by using the plasma spray coating technology. Cyclic oxidation studies are conducted on the uncoated and coated alloys at 700 °C under static air environment. The kinetics of oxidation is studied by using the thermo-gravimetric method. Phase, microstructural, and chemical analysis tests are performed on as-sprayed and oxidized coatings. The coated alloys are found to be more resistant when compared to the uncoated alloys. The NiCrAlY + Cr<inf>2</inf>O<inf>3</inf> + YSZ coating is found to be more protective when compared to NiCrAlY + TiO<inf>2</inf> coating. It is concluded that the formation of Cr<inf>2</inf>O<inf>3</inf>, NiCr<inf>2</inf>O<inf>4</inf>, and Al<inf>2</inf>O<inf>3</inf> is attributed to the development of oxidation resistance in the coatings. © 2022, International Institute of Welding.AluminaAluminum oxideChemical analysisOxidation resistancePlasma jetsPlasma sprayingSprayed coatingsThermooxidationTitanium alloysYttria stabilized zirconiaCoating technologiesCyclic oxidationHigh temperature oxidation BehaviorMetallic coatingNiCrAlY/cr2O3/YSZNiCrAlY/TiO2Plasma spray coatingTitaniaTitanium (alloys)YSZ coatingsTitanium dioxide