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R&D Status and Needs for Improved EB-PVD Thermal Barrier Coating Performance

Published online by Cambridge University Press:  17 March 2011

C. Leyens,
U. Schulz,
M. Bartsch and
M. Peters
C. Leyens
Affiliation:
DLR-German Aerospace Center Institute of Materials Research 51170 Cologne, Germany
U. Schulz
Affiliation:
DLR-German Aerospace Center Institute of Materials Research 51170 Cologne, Germany
M. Bartsch
Affiliation:
DLR-German Aerospace Center Institute of Materials Research 51170 Cologne, Germany
M. Peters
Affiliation:
DLR-German Aerospace Center Institute of Materials Research 51170 Cologne, Germany
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Abstract

The key issues for thermal barrier coating development are high temperature capability and durability under thermal cyclic conditions as experienced in the hot section of gas turbines. Due to the complexity of the system and the interaction of the constituents, performance improvements require a systems approach. However, there are issues closely related to the ceramic top coating and the bond coat, respectively. Reduced thermal conductivity, sintering, and stresses within the ceramic coating are addressed in the paper as well as factors affecting failure of the TBC by spallation. The latter is primarily governed by the formation and growth of the thermally grown oxide scale and therefore related to the bond coat. A strategy for lifetime assessment of TBCs is discussed.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 645: Symposium M – Thermal Barrier Coatings-2000 , 2000, M10.1.1
Copyright
Copyright © Materials Research Society 2001

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References

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