Effects of interface roughness on residual stresses in thermal barrier coatings
Journal
Journal of the American Ceramic Society
Journal Volume
82
Journal Issue
4
Pages
1073-1075
Date Issued
1999
Author(s)
Hsueh, C.-H.
Haynes, J.A.
Lance, M.J.
Becher, P.F.
Ferber, M.K.
Fuller Jr.
E.R.
Langer, S.A.
Carter, W.C.
Cannon, W.R.
Abstract
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.
SDGs
Type
journal article