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.
Original language | English |
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Pages (from-to) | 657-660 |
Number of pages | 4 |
Journal | Surface and Coatings Technology |
Volume | 204 |
Issue number | 5 |
DOIs | |
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