Thermomechanical evaluation and thermal expansion behavior of plasma-sprayed thermal barrier coatings

K. Takagi, D. Kudo, A. Kawasaki, Y. Harada, M. Okazaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We aim at industrial standardization of a testing method for thermal expansion behavior of thermal barrier coatings (TBCs). A push-rod type thermomechanical analysis (TMA) was selected as a widely used method, and was examined whether to evaluate accurate thermal expansion behavior from a thin specimen with the thickness of practical TBCs. We first demonstrated that the TMA measurements with a specimen support and optimum conditions were able to provide accurate mean coefficients of thermal expansion (CTEs) of dense yettria- stabilized zirconia (YSZ) from the thin specimens with the thickness down to 0.3mm. In addition, it showed good reproducibility with small measurement error less than 5%. This modified TMA was also assured to be able to accurately evaluate CTEs and sintering behavior of plasma-sprayed YSZ from 0.3mm-thick specimens. Therefore, we actually used this method to explore the influence of annealing on thermal expansion behavior of the YSZ coating. As a result, the modified TMA measurements detected a slightly monotonie decrease in CTE with annealing.

Original languageEnglish
Title of host publicationExpanding Thermal Spray Performance to New Markets and Applications - Proceedings of the 2009 International Thermal Spray Conference, ITSC 2009
Pages18-22
Number of pages5
DOIs
Publication statusPublished - 2009
EventExpanding Thermal Spray Performance to New Markets and Applications - 2009 International Thermal Spray Conference, ITSC 2009 - Las Vegas, NV, United States
Duration: 2009 May 42009 May 7

Publication series

NameProceedings of the International Thermal Spray Conference

Other

OtherExpanding Thermal Spray Performance to New Markets and Applications - 2009 International Thermal Spray Conference, ITSC 2009
Country/TerritoryUnited States
CityLas Vegas, NV
Period09/5/409/5/7

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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