Residual stress measurement of an EB-PVD Y2O3-ZrO2 thermal barrier coating by micro-Raman spectroscopy

M. Tanaka; R. Kitazawa; T. Tomimatsu; Y. F. Liu; Y. Kagawa

doi:10.1016/j.surfcoat.2009.08.042

Residual stress measurement of an EB-PVD Y₂O₃-ZrO₂ thermal barrier coating by micro-Raman spectroscopy

M. Tanaka, R. Kitazawa, T. Tomimatsu, Y. F. Liu, Y. Kagawa

SCI - Physics

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

Residual stress distribution in an EB-PVD 4 mol% Y₂O₃-ZrO₂ thermal barrier coating (TBC) layer coated on a superalloy substrate has been measured by micro-Raman spectroscopy. Piezo-spectroscopic coefficient was independently calibrated on a freestanding TBC layer. The coefficient for uniaxial stress is Π_uni = 5.43 cm^{- 1}GPa^{- 1}. The stress measurement through the TBC thickness shows compressive stress distribution from small to an almost large constant value. Such a distribution agrees with theoretical consideration since the small stress correctly reflects the free edge effect and the large constant stress is closely related to TBC bulk stresses.

Original language	English
Pages (from-to)	657-660
Number of pages	4
Journal	Surface and Coatings Technology
Volume	204
Issue number	5
DOIs	https://doi.org/10.1016/j.surfcoat.2009.08.042
Publication status	Published - 2009 Dec 15

Keywords

Piezo-spectroscopic coefficient
Raman spectroscopy
Stress measurement
Thermal barrier coating
YO-ZrO

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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title = "Residual stress measurement of an EB-PVD Y2O3-ZrO2 thermal barrier coating by micro-Raman spectroscopy",

abstract = "Residual stress distribution in an EB-PVD 4 mol% Y2O3-ZrO2 thermal barrier coating (TBC) layer coated on a superalloy substrate has been measured by micro-Raman spectroscopy. Piezo-spectroscopic coefficient was independently calibrated on a freestanding TBC layer. The coefficient for uniaxial stress is Πuni = 5.43 cm- 1GPa- 1. The stress measurement through the TBC thickness shows compressive stress distribution from small to an almost large constant value. Such a distribution agrees with theoretical consideration since the small stress correctly reflects the free edge effect and the large constant stress is closely related to TBC bulk stresses.",

keywords = "Piezo-spectroscopic coefficient, Raman spectroscopy, Stress measurement, Thermal barrier coating, YO-ZrO",

author = "M. Tanaka and R. Kitazawa and T. Tomimatsu and Liu, {Y. F.} and Y. Kagawa",

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T1 - Residual stress measurement of an EB-PVD Y2O3-ZrO2 thermal barrier coating by micro-Raman spectroscopy

AU - Tanaka, M.

AU - Kitazawa, R.

AU - Tomimatsu, T.

AU - Liu, Y. F.

AU - Kagawa, Y.

PY - 2009/12/15

Y1 - 2009/12/15

N2 - Residual stress distribution in an EB-PVD 4 mol% Y2O3-ZrO2 thermal barrier coating (TBC) layer coated on a superalloy substrate has been measured by micro-Raman spectroscopy. Piezo-spectroscopic coefficient was independently calibrated on a freestanding TBC layer. The coefficient for uniaxial stress is Πuni = 5.43 cm- 1GPa- 1. The stress measurement through the TBC thickness shows compressive stress distribution from small to an almost large constant value. Such a distribution agrees with theoretical consideration since the small stress correctly reflects the free edge effect and the large constant stress is closely related to TBC bulk stresses.

AB - Residual stress distribution in an EB-PVD 4 mol% Y2O3-ZrO2 thermal barrier coating (TBC) layer coated on a superalloy substrate has been measured by micro-Raman spectroscopy. Piezo-spectroscopic coefficient was independently calibrated on a freestanding TBC layer. The coefficient for uniaxial stress is Πuni = 5.43 cm- 1GPa- 1. The stress measurement through the TBC thickness shows compressive stress distribution from small to an almost large constant value. Such a distribution agrees with theoretical consideration since the small stress correctly reflects the free edge effect and the large constant stress is closely related to TBC bulk stresses.

KW - Piezo-spectroscopic coefficient

KW - Raman spectroscopy

KW - Stress measurement

KW - Thermal barrier coating

KW - YO-ZrO

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