Ceria–yttria stabilized zirconia (CYSZ) thermal barrier coatings (TBCs) were deposited by air plasma
spraying on NiCoCrAlY-coated Inconel 738LC substrates. After that, the surface of plasma sprayed CYSZ
TBCs were glazed using a pulsed Nd:YAG laser. The effects of laser glazing on hot corrosion resistance
of the coatings were evaluated in presence of 45 wt%Na2SO4 + 55 wt%V2O5 corrosive molten salt at
1000 C. The results revealed that the hot corrosion resistance of plasma sprayed CYSZ TBCs were
enhanced more than twofold by laser surface glazing due to reducing specific reactive area of the dense
glazed surface layer and consequently, decreasing the reaction between molten salt and zirconia
stabilizers.