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Effects of Interface Roughness on Residual Stresses in Thermal Barrier Coatings
Author(s) -
Hsueh ChunHway,
Haynes James A.,
Lance Michael J.,
Becher Paul F.,
Ferber Mattison K.,
Fuller Edwin R.,
Langer Stephen A.,
Carter W. Craig,
Can W. Roger
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb01878.x
Subject(s) - microstructure , thermal barrier coating , materials science , residual stress , composite material , coating , surface finish , finite element method , residual , thermal , structural engineering , computer science , physics , algorithm , meteorology , 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.