Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 513-14, Issue -, Pages 302-310Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.02.006
Keywords
Thermal barrier coating; Finite element analysis; Eshelby; Creep; Oxidation; Stress accumulation
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Funding
- EPSRC [GR/S86334/01, EP/F029748]
- EPSRC [EP/F029748/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F029748/1, GR/S86334/01] Funding Source: researchfish
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Thermal barrier coatings provide a means of thermal insulation of gas turbine components exposed to elevated temperatures. They undergo severe microstructural changes and material degradation, which have been implemented in this work by means of a sequentially coupled microstructural mechanical calculation that made use of a self-consistent constitutive model within finite element calculations. Analyses for different temperatures and bond coat compositions were run, which reproduced the trends reported in previous research and identified the accumulation of high out-of-plane tensile stresses within the alumina layer as an additional phenomenon that could drive high temperature crack nucleation. (c) 2009 Elsevier B.V. All rights reserved.
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