Journal article
Through-thickness determination of phase composition and residual stresses in thermal barrier coatings using high-energy X-rays
Acta materialia, v 58(3), pp 943-951
01 Feb 2010
Abstract
High-energy X-rays were used to determine the local phase composition and residual stresses through the thickness of as-sprayed and heat-treated plasma-sprayed thermal barrier coatings consisting of a NiCoCrAlY bond coat and an yttria-stabilized zirconia (YSZ) topcoat produced with through-thickness segmentation cracks. The as-sprayed residual stresses reflected the combined influence of quenching stresses from the plasma spray process, thermal expansion mismatch between the topcoat, bond coat and substrate, and stress relief from the segmentation cracks. Heat treatments led to the formation of a thermally grown oxide (TGO) which was in compression in the plane, as well as relief of quenching stresses and development of a stress gradient in the YSZ topcoat. The high-energy X-ray technique used in this study revealed the effects that TGO and segmentation cracks have on the in-plane stress state of the entire coating. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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Details
- Title
- Through-thickness determination of phase composition and residual stresses in thermal barrier coatings using high-energy X-rays
- Creators
- C. M. Weyant - Northwestern UniversityJ. Almer - Argonne National LaboratoryK. T. Faber - Northwestern University
- Publication Details
- Acta materialia, v 58(3), pp 943-951
- Publisher
- Elsevier
- Number of pages
- 9
- Grant note
- DE-AC02-06CH11357 / US Department of Energy, Office of Science, Office of Basic Energy Science; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000274765600021
- Scopus ID
- 2-s2.0-72449200774
- Other Identifier
- 991021960799704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering