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Microstructure and Thermal Properties of Nanostructured 8 wt.% CeO2 Doped YSZ Coatings Prepared by Atmospheric Plasma Spraying

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Abstract

Nanostructured 8 wt.% CeO2-5.4 wt.% Y2O3-ZrO2 (CeYSZ) coatings were prepared by atmospheric plasma spraying technology. The microstructure, thermal diffusivity, and thermal cycle behavior of CeYSZ were investigated. The results show that the as-sprayed nano-CeYSZ coatings consist of tetragonal ZrO2 and Ce element is in solid solution with ZrO2. The CeYSZ coatings are characterized by nano-zones (unmelted nanoparticles), melted dense areas, splats, and pores. The thermal diffusivity of nano-CeYSZ coatings is 0.548 × 10−6 m2/s at room temperature. The addition of CeO2 decreases the thermal diffusivity of nano-YSZ coatings, which is mainly caused by the point defect scattering and grain-boundary scattering. The thermal cycle life of nano-CeYSZ coatings is about 860 cycles at 1050 °C. The spallation of the coatings occurs at the interface of CeYSZ/TGO.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China and the Aviation Science Foundation of 2011ZF51062.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China

    Lei Jin, Qinghe Yu, Liyong Ni & Chungen Zhou

  2. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), Beijing, China

    Lei Jin, Qinghe Yu, Liyong Ni & Chungen Zhou

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  1. Lei Jin
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Correspondence to Chungen Zhou.

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Jin, L., Yu, Q., Ni, L. et al. Microstructure and Thermal Properties of Nanostructured 8 wt.% CeO2 Doped YSZ Coatings Prepared by Atmospheric Plasma Spraying. J Therm Spray Tech 21, 928–934 (2012). https://doi.org/10.1007/s11666-012-9744-3

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  • DOI: https://doi.org/10.1007/s11666-012-9744-3

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