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Microstructure of Plasma Sprayed La2O3-Modified YSZ Coatings

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Yttria-stabilized zirconia (YSZ) has received great attention as a thermal barrier coating (TBC) material for its excellent thermal and mechanical properties. However, the grain growth of YSZ, particularly under temperatures higher than 1200 °C, limits its further applications to a great extent. In our present study, to develop better understanding of the aforementioned phenomenon and explore effective methods to conquer this challenge, TBCs using traditional and La2O3-modified YSZ powders were deposited by atmospheric plasma spraying and their microstructures were investigated. The results show that the La2O3 addition can effectively alleviate the grain growth of coatings under high temperatures.

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Acknowledgments

The authors would like to thank Ms. J. H. Gao and Mr. W. Wu for the SEM and EDS measurements. YFG thanks the Century Program (One-Hundred-Talent Program) of the Chinese Academy of Sciences for special funding support.

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Authors and Affiliations

  1. Chinese Academy of Sciences, Shanghai Institute of Ceramics, Dingxi 1295, Shanghai, 200050, People’s Republic of China

    Y. Liu, Y.F. Gao, S.Y. Tao, X.M. Zhou, W.D. Li, H.J. Luo & C.X. Ding

  2. Graduate University of the Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Y. Liu

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  1. Y. Liu
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  2. Y.F. Gao
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  3. S.Y. Tao
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  4. X.M. Zhou
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  5. W.D. Li
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  6. H.J. Luo
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  7. C.X. Ding
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Corresponding author

Correspondence to Y.F. Gao.

Additional information

This article is an invited paper selected from presentations at the 2008 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Thermal Spray Crossing Borders, Proceedings of the 2008 International Thermal Spray Conference, Maastricht, The Netherlands, June 2-4, 2008, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2008.

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Liu, Y., Gao, Y., Tao, S. et al. Microstructure of Plasma Sprayed La2O3-Modified YSZ Coatings. J Therm Spray Tech 17, 603–607 (2008). https://doi.org/10.1007/s11666-008-9226-9

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  • DOI: https://doi.org/10.1007/s11666-008-9226-9

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