Surface Microstructure and High Temperature Oxidation Resistance of Thermal Sprayed NiCoCrAlY Bond-Coat Modified by Cathode Plasma Electrolysis

- The surface properties of the APS bond-coat were modified by CPE.
- A re-melted layer without oxide stringers and pores was formed on modified sample.
- The selective oxidation of Al avoided the formation of other oxides.
- An oxide scale mainly composed of Al2O3 was formed on modified sample.
- The oxidation resistance of modified bond-coat was significantly improved.