Design,Preparation and Thermal Properties of (La0.4Sm0.5Yb0.1)2Zr2O7 Ceramic for Thermal Barrier Coatings

摘要：

　　Based on the theory of phonon transport and thermal expansion,a new complex rare-earth zirconate ceramic (La0.4Sm0.5Yb0.1)2Zr2O7,with low thermal conductivity and high thermal expansion coefficient,has been designed.The complex rare-earth zirconate (La0.4Sm0.5Yb0.1)2Zr2O7 powder for thermal barrier coatings (TBCs) was synthesized by coprecipitation-calcination method.The phase,microstructure and thermal properties of the new material were investigated.The results revealed that single phase (La0.4Sm0.5Yb0.1)2Zr2O7 with pyrochlore structure was synthesized.The thermal conductivity and the thermal expansion coefficient of the designed complex rare-earth zirconate ceramic is about 1.3W/m.K and 10.5×10-6/K,respectively.These results imply that (La0.4Sm0.5Yb0.1)2Zr2O7 can be explored as the candidate material for the ceramic layer in TBCs system.

关键词： Complex rare-earth zirconate thermal properties thermal barrier coating

作者: L.Liu ZH.Ma F.C.Wang Q.Xu

作者单位: School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials under Shock and Impact,Beijing 100081,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 469-473

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）