Influence of Gd_2O_3 and Yb_2O_3 Co-doping on Phase Stability,Thermo-physical Properties and Sintering of 8YSZ

作     者：ZHANG Yanli GUO Lei YANG Yongping GUO Hongbo ZHANG Hongju GONG Shengkai 

作者机构：School of Materials Science and Engineering Beihang University Beijing 100191 China Guizhou LiyangAviation Power Co. Ltd. Anshun 561102 China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2012年第25卷第6期

页      面：948-953页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：National Natural Science Foundation of China (50771009, 50731001) National Basic Research Program of China (2010CB631200) Research Fund for the Doctoral Program of Higher Education of China (20070006017) 

主　　题：thermal barrier coatings (TBCs) Gd2O3 and Yb2O3 co doped 8YSZ (GYb YSZ) phase stability sintering ther mo physical properties 

摘      要：The role of multicomponent rare earth oxides in phase stability, thermophysical properties and sintering for ZrO2-based thermal barrier coatings （TBCs） materials is investigated. 8YSZ codoped with 3 mol% Gd2O3 and 3 mol% Yb2O3 （GYb-YSZ） powders are synthesized by solid state reaction for 24 h at various temperatures. As temperature increases, stabilizers are dissolved into zirconia matrix gradually. Synthesized at 1 500 °C, GYb-YSZ is basically composed of cubic phase. GYb-YSZ exhibits excellent phase stability and sinters lower than 8YSZ by nearly three times. The thermal conductivity of GYb-YSZ is much lower than that of 8YSZ, and the thermal expansion coefficient of GYb-YSZ is comparable to that of 8YSZ. The influence of Gd2O3 and Yb2O3 co-doping on phase stability, thermal conductivity and sintering of 8YSZ is discussed.