The Oxidation Properties of a NiCrAlY Coating Fabricated by Arc Ion Plating

The microstructures, phase compositions, and high-temperature oxidation behavior of a NiCrAlY coating fabricated by arc ion plating were investigated scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), atomic force microscope (AFM), X-ray diffractometer (XRD). results indicate that the was covered protective Al2O3 scale with excellent resistance after at 1050 °C for 100 h; β rich in Al as-deposited transformed into γ/γ’ phase; interdiffusion zone (IDZ), secondary reaction (SRZ), needle-like TCP phases detected superalloy substrate beneath coating.