Effects of interface roughness on residual stresses in thermal barrier coatings

Journal Article · Thu Apr 01 04:00:00 EST 1999 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1999.tb01878.x· OSTI ID:347466

Hsueh, C H; Haynes, J A; Becher, P F; Ferber, M K ^[1]; Lance, M J ^[1]; Fuller, Jr, E R; Langer, S A; Carter, W C ^[2]; Cannon, W R ^[3]

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1. Oak Ridge National Lab., TN (United States)
2. National Inst. of Standards and Technology, Gaithersburg, MD (United States)
3. Rutgers Univ., Piscataway, NJ (United States). Dept. of Ceramics and Materials Engineering

Using a newly developed object-oriented finite-element analysis method, both an actual microstructure and model microstructures of a plasma-sprayed thermal barrier coating system were numerically simulated to analyze the full-field residual stresses of this coating system. Residual stresses in the actual microstructure were influenced by both the irregular top-coat/bond-coat interface and cracks in the top coat. By treating the microcracked top coat as a more-compliant solid microstructure, the effects of the irregular interface on residual stresses were examined. These results then could be compared to results that have been obtained by analyzing a model microstructure with a sinusoidal interface, which has been considered by some earlier investigators.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 347466
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 4 Vol. 82; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
FINITE ELEMENT METHOD
INTERFACES
MATHEMATICAL MODELS
NICKEL ALLOYS
RESIDUAL STRESSES
ROUGHNESS
YTTRIUM ALLOYS
YTTRIUM OXIDES
ZIRCONIUM OXIDES