Abstract

4 mol% Yttria-stabilized zirconia (4YSZ) coatings with 200µm thick are fabricated by Electron Beam Physical Vapor Deposition (EB-PVD) for thermal barrier coating (TBC). 150µm of NiCrAlY based bond coat is prepared by conventional APS (Air Plasma Spray) method on the NiCrCoAl alloy substrate before deposition of top coating. 4 mol% YSZ top coating shows typical tetragonal phase and columnar structure due to vapor phase deposition process. The adhesion strength of coating is measured about 40 MPa. There is no delamination or cracking of coatings after thermal cyclic fatigue and shock test at 850°C.

• Keywords: Electron Beam Physical Vapor Deposition(EB-PVD);Yttria Stabilized Zirconia(YSZ);Thermal Barrier Coating(TBC);Thermal Cyclic Fatigue;