Measurement of residual stress in air plasma-sprayed Y2O3-ZrO2 thermal barrier coating system using micro-Raman spectroscopy

2006-03-15
Tanaka, Makoto
Hasegawa, Makoto
Dericioğlu, Arcan Fehmi
Kagawa, Yutaka
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.

Citation Formats
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.