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    Numerical study on interaction of surface cracking and interfacial delamination in thermal barrier coatings under tension

    Access Status
    Fulltext not available
    Authors
    Zhu, W.
    Yang, L.
    Guo, J.
    Zhou, Y.
    Lu, Chunsheng
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Zhu, W. and Yang, L. and Guo, J. and Zhou, Y. and Lu, C. 2014. Numerical study on interaction of surface cracking and interfacial delamination in thermal barrier coatings under tension. Applied Surface Science. 315: pp. 292-298.
    Source Title
    Applied Surface Science
    DOI
    10.1016/j.apsusc.2014.07.142
    ISSN
    01694332
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/6506
    Collection
    • Curtin Research Publications
    Abstract

    The interaction of surface cracking and interfacial delamination in thermal barrier coatings under tension is investigated by using a cohesive zone finite element model. It is found that the surface crack density has a significant effect on the initiation and propagation of interfacial delamination. The interfacial delamination length decreases with increase of the surface crack density. The influence of ceramic coating thickness and interfacial adhesion parameters on surface cracking and interfacial delamination is discussed. It is shown that the saturated crack densities decrease with increase of the ceramic coating thickness and interfacial delamination length, and the critical surface crack density without interfacial delamination decreases as the interfacial adhesion energy increases. The results imply that the larger the surface crack density and interfacial adhesion energy are, the less the probability of interfacial delamination.

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