Active standard | Published: 20/03/2025

ISO 21456:2025

Determination of the residual stress of TGO layer in thermal barrier coating by photoexcitation fluorescence piezoelectric spectroscopy
(Détermination de la contrainte résiduelle de la couche TGO dans les revetements barrieres thermiques par spectroscopie de photoexcitation fluorescente et piezoélectrique)

Available languages: English

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Detail information

Designation: ISO 21456:2025

Publication date: 20/03/2025

Pages: 11

Country: International technical standard

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Anotation

Description / Abstract: This document specifies a test method for the determination of the residual stress of the TGO layer in thermal barrier coating (TBC) by photoexcitation fluorescence piezoelectric spectroscopy. This test method specifies that there is a Cr element in the bond coat of the TBC. This test method to determine the residual stress in the TGO layer of the TBC system is not limited by the preparation method of the TBCs. Particularly, the TBC system prepared by electron beam-physical vapour deposition (EB-PVD) has a better effect. This method provides guidance on determining reliable estimates of residual stresses from fluorescence spectral data and estimating uncertainties in the results.

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