LI Renwei ¹, GONG Wenbiao ²
(1. School of Engineering Training Center, Northeast Dianli University, Jilin 132012, Jilin, China; 2. Key Laboratory of Advanced
Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, Jilin, China)

Abstract: An atmospheric plasma spraying technology was used to prepare two thermal barrier coatings on the surface of high-temperature alloy, in which the conventional nanosized yttria-partially-stabilized zirconia (YSZ) and YSZ + 25wt.% CeO₂ (CSZ) were applied, respectively. The thermal shock test was carried out at 900 ℃ and SEM and EDS technologies were used to analyze the thermal shockresistance of YSZ and CSZ ceramic coatings. The results showed that the CSZ coating failed at the 63rd thermal shock test and the YSZ coating failed at the 21st test, indicating that the thermal shock-resistance of the new CSZ coating should be significantly superior to that of the YSZ coating under the same condition and CeO₂ could improve the thermal shock-resistance of yttria-partially-stabilized zirconia.
Key words: yttria stabilized zirconia; air plasma spray; ceramic coating; thermal shock resistance