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Degradation of Sm2Zr2O7 Thermal Barrier Coating Caused by Calcium-Magnesium-Aluminum-Silicon Oxide (CMAS) Deposition

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Energy Technology 2015

Abstract

Rare earth zirconates are promising materials for use as thermal barrier coatings in gas turbine engines. Among the lanthanide zirconate materials, Sm2Zr2O7 with the pyrochlore structure has lower thermal conductivity and better corrosion resistance against calcium-magnesium-aluminum-silicon oxide (CMAS). In this work, after reaction with CMAS, the pyrochlore structure transforms to the cubic fluorite structure and Ca2Sm8(SiO4)6O2 forms in elongated grain.

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Author information

Authors and Affiliations

  1. Auburn University, 275 Wilmore Laboratories, AL, 36849, USA

    Honglong Wang, Zhizhi Sheng, Emily Tarwater, Xingxing Zhang, Sudip Dasgupta & Jeffrey W. Fergus

Authors
  1. Honglong Wang
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  2. Zhizhi Sheng
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  3. Emily Tarwater
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  4. Xingxing Zhang
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  5. Sudip Dasgupta
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  6. Jeffrey W. Fergus
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Editor information

Editors and Affiliations

  1. School of Materials and Metallurgy, Northeastern University, USA

    Cong Wang (professor) (professor)

  2. Group Lead in the Advanced Process & Decision Systems, Department at the Idaho National Laboratory (INL), Idaho, USA

    Donna P. Guillen (Distinguished) (Distinguished)

  3. Department of Materials Science and Engineering, Cornell University, USA

    Li Li (Senior Research Associate) (Senior Research Associate)

  4. TMS Extraction and Processing, USA

    Cynthia K. Belt (Vice-Chair) (Vice-Chair)

  5. MIT Concrete Sustainability Hub, USA

    Randolph Kirchain (co-director) (co-director)

  6. Argonne National Laboratory, Iowa State University, USA

    Jeffrey S. Spangenberger (senior engineering specialist) (senior engineering specialist)

  7. College of Engineering at Lamar, University in Beaumont, Texas, USA

    Andrew Jewel Gomes (Associate Professor) (Associate Professor)

  8. Rolls Royce LG Fuel Cell Systems, Inc., Ohio, USA

    Amit Pandey (working as a development lead in reliability) (working as a development lead in reliability)

  9. University of California Berkeley in the department of Nuclear Engineering, USA

    Peter Hosemann (Associate Professor) (Associate Professor)

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© 2015 TMS (The Minerals, Metals & Materials Society)

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Wang, H., Sheng, Z., Tarwater, E., Zhang, X., Dasgupta, S., Fergus, J.W. (2015). Degradation of Sm2Zr2O7 Thermal Barrier Coating Caused by Calcium-Magnesium-Aluminum-Silicon Oxide (CMAS) Deposition. In: Jha, A., et al. Energy Technology 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48220-0_38

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