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Relationship between microstructure of plasma-sprayed 8YZ coatings and thermal fatigue life of thermal barrier coatings

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Abstract

Microstructure of plasma-sprayed yttria-stabilized zirconia coatings (8YZ) was characterized by the measurement of surface roughness, hardness, and pore size distribution and was correlated with thermal fatigue life. It was confirmed that the coatings which had greater roughness tended to show both lower hardness and higher porosity. Furthermore, such coatings were found to have a longer thermal fatigue life. We propose that measurement of the roughness of 8YZ coatings is useful as a non-destructive evaluation method for predicting thermal fatigue life.

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Authors and Affiliations

  1. Power Supply Materials and Devices Laboratory, Corporate Research and Development Center, Toshiba Corporation, 1, Komukai, Toshiba-cho, Saiwai-ku, Kawasaki, 210-8582, Japan

    K. Yasuda

  2. Power Supply Materials and Devices Laboratory, Corporate Research and Development Center, Toshiba Corporation, 1, Komukai, Toshiba-cho, Saiwai-ku, Kawasaki, 210-8582, Japan

    S. Suenaga, H. Inagaki, Y. Goto & H. Takeda

  3. Power and Industrial Systems Research and Development Center, Toshiba Corporation, Yokohama, 235-0045, Japan

    K. Wada

Authors
  1. K. Yasuda
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  2. S. Suenaga
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  3. H. Inagaki
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  4. Y. Goto
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  5. H. Takeda
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  6. K. Wada
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Yasuda, K., Suenaga, S., Inagaki, H. et al. Relationship between microstructure of plasma-sprayed 8YZ coatings and thermal fatigue life of thermal barrier coatings. Journal of Materials Science 35, 317–321 (2000). https://doi.org/10.1023/A:1004745301833

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  • DOI: https://doi.org/10.1023/A:1004745301833

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