Authors: Wen Ma Dongxing Wang Hongying Dong Wenshan Lun Weiyan He Xuebin Zheng
Publish Date: 2012/11/22
Volume: 22, Issue: 2-3, Pages: 104-109
Abstract
Y2O3 and Yb2O3 codoped strontium zirconate with chemistry of SrZr09Y005Yb005O295 SZYY was synthesized and had a minor second phase of Yb2O3 The SZYY showed good phase stability not only from room temperature to 1400 °C but also at high temperature of 1450 °C for a long period analyzed by thermogravimetrydifferential scanning calorimetry and xray diffraction respectively The coefficients of thermal expansion CTEs of the sintered bulk SZYY were recorded by a hightemperature dilatometer and revealed a positive influence on phase transitions of SrZrO3 by codoping with Y2O3 and Yb2O3 The thermal conductivities of SZYY were at least ~30 lower in contrast to that of SrZrO3 and 8YSZ in the whole tested temperature range Good chemical compatibility was observed for SZYY with 8YSZ or Al2O3 powders after a 24 h heat treatment at 1250 °C The phase stability and the microstructure evolution of the assprayed SZYY coating during annealing at 1400 °C were also investigatedThis article is an invited paper selected from presentations at the 2012 International Thermal Spray Conference and has been expanded from the original presentation It is simultaneously published in Thermal Spray 2012 Proceedings of the International Thermal Spray Conference Air Land Water and the Human Body Thermal Spray Science and Applications Houston Texas USA May 2124 2012 Basil R Marple Arvind Agarwal Laura FilofteiaToma Margaret M Hyland YukChiu Lau ChangJiu Li Rogerio S Lima and André McDonald Ed ASM International Materials Park OH 2012The authors gratefully acknowledge the financial support by the National Natural Science Foundation of China 51062012 the Key Project of Chinese Ministry of Education 210035 and the Program for New Century Excellent Talents in University NCET111017 The project was also funded by the Key Laboratory of Inorganic Coating Materials Chinese Academy of Sciences
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