Phase transformation of ZrO doped with CeO.

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. In this study, the micro-ZrO and the nano-ZrO doped with 10 wt% CeO as well as micro-ZrO and nano-ZrO were prepared by air plasma spraying (APS) to study the advantages of the addition of rare earth element. The effect of CeO on the phase transformation of ZrO was studied. The results show that there are few cracks in micro- and nano-ZrO doped with 10 wt% CeO, and rare earth oxides can affect the phase transformation significantly. The morphologies, hardness and elastic modulus of the four ceramic layers were also discussed. [ABSTRACT FROM AUTHOR]