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Measurement of residual stress in air plasma-sprayed Y2O3-ZrO2 thermal barrier coating system using micro-Raman spectroscopy
Date
2006-03-15
Author
Tanaka, Makoto
Hasegawa, Makoto
Dericioğlu, Arcan Fehmi
Kagawa, Yutaka
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Residual stress in air plasma-sprayed Y2O3 stabilized ZrO2 thermal barrier coating (TBC) has been measured using micro-Raman spectroscopy. The frequency shift of Raman peak from tetragonal phase (approximate to 640 cm(-1)) is used for determination of local stress in TBC. The relation between Raman peak shift and applied uniaxial stress is measured using a freestanding specimen. The relation is used to determine actual residual stress of the TBC layer coated on a stainless steel substrate. The uniaxial stress, sigma(U)(thc) and Raman peak shift, Delta nu, on the freestanding TBC layer follows: Delta v = Pi sigma(U)(thc)(Pi = 25 cm(-1) GPA(-1)). The average in-plane residual stress in this layer is smaller than that obtained from thermal stress, although the trend of measured values versus thickness follows the estimated thermal stress-substrate thickness relation. This experimental evidence suggests that measurement by micro-Raman spectroscopy is an effective tool to determine local and average residual stress in the Y2O3 stabilized ZrO2 TBC layer.
Subject Keywords
Residual stress
,
Micro-Raman spectroscopy
,
Thermal barrier coating system
,
ZIRCONIA
,
LAYER
URI
https://hdl.handle.net/11511/33360
Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
DOI
https://doi.org/10.1016/j.msea.2005.12.034
Collections
Department of Metallurgical and Materials Engineering, Article
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BibTeX
M. Tanaka, M. Hasegawa, A. F. Dericioğlu, and Y. Kagawa, “Measurement of residual stress in air plasma-sprayed Y2O3-ZrO2 thermal barrier coating system using micro-Raman spectroscopy,”
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
, vol. 419, pp. 262–268, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33360.