Advanced thermal barrier coatings (TBCs) have attracted extensive attention in the field of advanced aero-engine. The thermal cycling life and failure behavior of advanced TBCs still remain a challenge. This work focuses on crystal structure, microstructure and failure behavior of the LaZrCeO/YSZ double ceramic layers TBCs. A composite of pyrochlore and fluorite is formed in LaZrCeO/YSZ coating. The microstructure of LaZrCeO/YSZ coating is composed of feathery nanostructure and intra-columnar pores. The LaZrCeO/YSZ DCL TBCs exhibit good thermal cycling life at 1100 °C. After thermal cycling test, the cracks initiated and propagated in TGO layer due to the stress concentration, including horizontal cracks and vertical cracks, led to the instability of the whole coating system, and finally caused the failure of TBCs.


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    Titel :

    Microstructure and thermal cycling life of LaZrCeO thermal barrier coatings deposited by electron beam physical vapor deposition


    Beteiligte:
    MU Rende (Autor:in) / LIU Guanxi (Autor:in) / XIE Xiaochang (Autor:in)


    Erscheinungsdatum :

    2022




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt