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NiCoCrAlY bond coat was deposited on Ni-based superalloy by means of EB-PVD method. Surface treatment by means of polishing and shot-peening methods were used in order to study the effect of surface conditions on the bond coat performance at 1100 °C. Oxidation resistance was found to be strongly affected by surface modification during pre-oxidation treatment.
The isothermal oxidation behaviour of EB-PVD NiCoCrAlY bond coat on nickel based superalloy at different treatment conditions were studied at 1100°C up to 100h. The reaction products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDS). It is found that after 10h oxidation, while a protective alumina layer was developed on...
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