Preparation and Thermophysicat Properties of (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 Ceramic for Thermal Barrier Coatings
A complex rare-earth zirconate (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 powder for thermal barrier coatings (TBCs) was synthesized by coprecipitation method.The phase composition,microstructure and the thermophysical properties were investigated.XRD results revealed that single phase (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 with pyrochlore structure was prepared and the SEM result showed that the microstructure of the product was dense and no other phases existed among the particles.With the temperature increasing,the thermal expansion coefficient (CTE) of the ceramic increased,while the thermal conductivity decreased.The results indicated that CTE of the ceramic was slightly higher than that of La2Zr2O7 and the thermal conductivity of the ceramic was lower than that of La2Zr2OT.These results imply that (La0.4Sm0.5Yb0.1)2(Zr0.7Ce0.3)2O7 can be explored as the candidate material for the ceramic layer in TBCs system.
Complex rare-earth zirconate Coprecipitation Thermophysical properties
Liu Ling Xu Qiang Wang Fuchi Zhang Hongsong
School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
1334-1336
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）