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

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

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルExpanding Thermal Spray Performance to New Markets and Applications - Proceedings of the 2009 International Thermal Spray Conference, ITSC 2009
ページ18-22
ページ数5
DOI
出版ステータスPublished - 2009
イベントExpanding Thermal Spray Performance to New Markets and Applications - 2009 International Thermal Spray Conference, ITSC 2009 - Las Vegas, NV, United States
継続期間: 2009 5月 42009 5月 7

出版物シリーズ

名前Proceedings of the International Thermal Spray Conference

Other

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

ASJC Scopus subject areas

  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学

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