Author/Authors :
Zhao، نويسنده , , Sumei and Zhao، نويسنده , , Yu and Zhu، نويسنده , , Ling and Gu، نويسنده , , Lijian and Huang، نويسنده , , Wenzhi and Fan، نويسنده , , Xizhi and Zou، نويسنده , , Binglin and Wang، نويسنده , , Ying and Cao، نويسنده , , Xueqiang، نويسنده ,
Abstract :
Double-ceramic-layer (DCL) thermal barrier coatings (TBCs) of La2(Zr0.7Ce0.3)2O7 (LZ7C3) and Eu3+-doped zirconia, which was partially stabilised by 8 wt% yttria (8YSZ:Eu), were prepared by atmospheric plasma spraying. A thermal cycling test was carried out. The 8YSZ:Eu sublayer exposed during thermal cycling could produce visible luminescence under ultraviolet (UV) illumination, providing an indication of the spallation and damage degree of the coating. The result shows that the application of a Eu3+-doped luminescence sublayer can be a very simple and useful non-destructive technique to indicate the spallation and damage degree of DCL coatings.
Keywords :
Luminescence sublayer , Non-destructive technique , Self-indicating , Thermal barrier coatings
