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- Title
The Measurement of Residual Strains Within Thermal Barrier Coatings Using High-Energy X-Ray Diffraction.
- Authors
Thornton, J.; Slater, S.; Almer, J.
- Abstract
The residual strains through the entire thickness of the zirconia layer of pristine and heat-treated thermal barrier coatings (TBCs) were mapped to help elucidate the failure mechanisms of TBCs. The strains were measured using 80.72 keV synchrotron radiation and a transmission geometry. The heat-treated TBC showed that a compressive strain formed in the zirconia layer of the TBC on cooling but this strain was diluted and reversed by the oxidation-driven expansion of the underlying metals. It also showed large (0.0024) out-of-plane tensile strains in the zirconia layer just above its interface with a thick underlying oxide layer.
- Subjects
ZIRCONIUM oxide; THERMAL batteries; COATING processes; SURFACES (Technology); THERMODYNAMICS; MATERIALS science
- Publication
Journal of the American Ceramic Society, 2005, Vol 88, Issue 10, p2817
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2005.00331.x