Ce1-xSmxO2-x/2-A novel type of ceramic material for thermal barrier coatings

被引：29
作者：
Chen, Xiao-ge [1 ]
Zhang, Haoming [2 ]
Zhang, Hong-song [2 ,3 ]
Zhao, Yong-de [3 ]
Li, Gang [2 ]
机构：
[1] Henan Inst Engn, Dept Construct Engn, Zhengzhou 450007, Peoples R China
[2] Henan Inst Engn, Dept Mech Engn, Zhengzhou 450007, Peoples R China
[3] Henan Acad Sci, Inst Chem, Zhengzhou 450052, Peoples R China
来源：
JOURNAL OF ADVANCED CERAMICS | 2016年 / 5卷 / 03期
基金：
中国国家自然科学基金;
关键词：
thermal barrier coatings (TBCs); CeO2; oxides; doping; thermophyscial properties; CERIUM OXIDE NANOPARTICLES; FUEL-CELLS; THERMOPHYSICAL PROPERTIES; RAMAN-SPECTROSCOPY; SOLID-SOLUTIONS; CONDUCTIVITY; EXPANSION; SYSTEM; ELECTROLYTE; ZIRCONIUM;
D O I：
10.1007/s40145-016-0196-y
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, Ce1-xSmxO2-x/2 ceramics were synthesized by sol-gel route and solid state sintering method. The phase structure was analyzed by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and Raman spectroscopy. The morphologies of the synthesized powders and the corresponding bulk samples were observed using scanning electron microscopy (SEM). Their thermal diffusivities and thermal expansion coefficients were measured by the laser-flash method and the pushing-rod method, respectively. Results show that pure Ce1-xSmxO2-x/2 powders with single fluorite structure are synthesized successfully, and their microstructures of the corresponding bulk samples are very dense. With the increase of Sm2O3 content, their thermal expansion coefficients decrease due to the higher electro-negativity of Sm3+ ions as compared with that of Ce4+ ions. Their thermal conductivities at 1000 degrees C lie in the range of 1.62-2.02 W/(m.K) due to the phonon scattering caused by the substituted atoms and oxygen vacancies. The Ce1-xSmxO2-x/2 ceramics can be used as ceramic candidates for novel thermal barrier coatings (TBCs).
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页码：244 / 252
页数：9
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