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Research Article | Open Access

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

Xiao-ge CHENaHaoming ZHANGbHong-song ZHANGb,c( )Yong-de ZHAOcGang LIb
Department of Construction Engineering, Henan Institute of Engineering, Zhengzhou 450007, China
Department of Mechanical Engineering, Henan Institute of Engineering, Zhengzhou 450007, China
Institute of Chemistry Henan Academy Sciences, Zhengzhou 450052, China
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Abstract

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 ℃ 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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Journal of Advanced Ceramics
Pages 244-252
Cite this article:
CHEN X-g, ZHANG H, ZHANG H-s, et al. Ce1-xSmxO2-x/2—A novel type of ceramic material for thermal barrier coatings. Journal of Advanced Ceramics, 2016, 5(3): 244-252. https://doi.org/10.1007/s40145-016-0196-y

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Received: 09 April 2016
Revised: 09 June 2016
Accepted: 11 June 2016
Published: 21 August 2016
© The author(s) 2016

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons. org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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