Thermal Cycling Behavior of Sm2Zr2O7 Ceramics Thermal Barrier Coatings by APS

摘要：

　　The pyrochlore structural ceramic of Sm2Zr2O7 was synthesized by chemical coprecipitation method.Then the feedstock powder for plasma spraying was prepared by spray drying with proper distribution of particle size about 30-70 μm.The thermal barrier coatings with a topcoat of Sm2Zr2O7 and with a two-layer topcoat of Sm2Zr2O7/YSZ were prepared by atmospheric plasma spraying (APS).The cohesive strength of Sm2Zr2O7 and Sm2Zr2O7/YSZ coating presented a value of 15.49 and 23.37 MPa,respectively.Microstructure and phase analyses reveal that plasma spraying of complex Sm2Zr2O7 is accompanied with the formation of the transverse crack networks.The TBCs with topcoat of Sm2Zr2O7 and Sm2Zr2O7/YSZ performed a thermal cycles of 35 and 60 separately under the test temperature of 1100 ℃.The thermally grown oxide at the topcoat-bondcoat interface was also the major factors that lead to the coating failure on thermal cycling at about 1100 ℃.

关键词： rare-earth zirconates atmospheric plasma spraying thermal barrier coating

作者: Xiankai Sun Quansheng Wang Yanbo Liu Can wang

作者单位: School of Material Science and Engineering,Beijing Institute of Technology,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: 1058-1061

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）