A study on the mechanical and thermal shock properties of MCrAlY coating prepared by arc ion plating

Abstract In this study, MCrAlY coatings with different microstructures were prepared by arc ion plating to investigate the mechanical and thermal shock properties of coatings. The results show that overall possessed similar hardness (7.66 GPa–9.20 GPa) but lower elastic modulus (119.07 GPa–148.02 GPa), compared those conventional sprayings. microstructure coating had a significant impact on property. columnar structure exhibited poor After test, failed in form penetrating cracks, which ultimately caused stress corrosion substrate. A dense laminar was desirable for ideal property, could be achieved increasing bias voltage applied substrate during preparation process coating. However, case, oxidation resistance decreased due loss Al