Phase transformation of ZrO ₂ doped with CeO ₂

Abstract

Abstract Thermal barrier coatings (TBCs) protection is widely used to prolong the lifetime of turbine components. The outermost layer of TBCs is ceramic layer, whose function is heat insulation, and the main composition of the ceramic layer is ZrO 2 . In this study, the micro‐ZrO 2 and the nano‐ZrO 2 doped with 10 wt% CeO 2 as well as micro‐ZrO 2 and nano‐ZrO 2 were prepared by air plasma spraying (APS) to study the advantages of the addition of rare earth element. The effect of CeO 2 on the phase transformation of ZrO 2 was studied. The results show that there are few cracks in micro‐ and nano‐ZrO 2 doped with 10 wt% CeO 2 , and rare earth oxides can affect the phase transformation significantly. The morphologies, hardness and elastic modulus of the four ceramic layers were also discussed.