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种晓宇,汪俊,蒋业华,冯晶.GdTaO4陶瓷的制备、力学性质和热导率研究[J].稀有金属材料与工程(英文),2019,48(4):1179~1182.[Chong XiaoYu,Wang Jun,Jiang YeHua and Feng Jing.Synthesis, mechanical properties and thermal conductivity of GdTaO4[J].Rare Metal Materials and Engineering,2019,48(4):1179~1182.]
Synthesis, mechanical properties and thermal conductivity of GdTaO4
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Received:August 26, 2017  Revised:October 19, 2017
Key words: Thermal barrier coatings  rare-earth tantalite  thermal conductivity  anisopropy of mechanical properties
Foundation item:昆明理工大学青年拔尖人才培养项目资助(项目号11504146);国家自然科学基金资助(项目号51762028)
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Chong XiaoYu,Wang Jun,Jiang YeHua and Feng Jing  
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      In order to search the more excellent thermal barrier coating materials, the monoclinic GdTaO4 ceramics are synthesized by solid-phase reaction. The microstructure is analyzed. The results of first-principles calculations indicate that the Young’s modulus along [100] crystallographic orientation is triple as large as that along [010] and [001] crystallographic orientation. The measured thermal conductivity is 1.70 W.m-1.K-1at 800℃ in experiment, which is lower than the thermal conductivities of 7-8YSZ (2.37-2.47 W.m-1.K-1). The GdTaO4 is a promising thermal barrier coating material.