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    Investigation of the Oxidation and Hot Corrosion Behavior of a MCrAlY and ZrO2+Y2O3 containing Thermal Barrier Coating (TBC) System Produced by the Atmospheric Plasma Spray (APS) Method at 750°C
    (Kırıkkale Üniversitesi, 2023) Özkan, Derviş; Erdogan, Garip; Binal, Gülfem; Ozgurluk, Yasin; Karaoglanlı, Abdullah Cahit
    In this study, a metallic bond coat with MCrAlY content and a yttria-stabilized zirconia (YSZ) ceramic topcoat were deposited on the Inconel 718 Ni-based superalloy substrate using the atmospheric plasma spray (APS) coating method. The produced TBC system was tested under oxidation and hot corrosion conditions, and its microstructural properties and changes were investigated. At 750 °C, isothermal oxidation tests were performed for 5, 25, 50 and 75 hours. Hot corrosion tests were carried out at 750°C for time periods of 1, 3 and 5 hours using mixtures of 45% Na2SO4 and 55% V2O5. The high-temperature behavior of the TBC system against the main damage mechanisms such as isothermal oxidation and hot corrosion was determined, and its microstructural changes were investigated in detail. It has been observed that factors affecting the TBC system's strength and microstructural changes under high temperature conditions include the composition of the components that comprise the TBC system, the temperature and time processes in which the tests are conducted, the components that constitute the hot corrosion environment, and their ratios.