The non destructive and nano-microstructural characterization of thermal-barrier coatings

    Authors

    Y. H. Sohn; B. Jayaraj; S. Laxman; B. Franke; J. W. Byeon;A. M. Karlsson

    Comments

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    Abbreviated Journal Title

    Jom

    Keywords

    PHYSICAL VAPOR-DEPOSITION; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; EB-PVD TBC; GROWN OXIDE; RESIDUAL-STRESS; NONDESTRUCTIVE EVALUATION; OXIDATION STRESSES; NICKEL-ALUMINIDE; DURABILITY; MECHANISMS; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering; Mineralogy; Mining & Mineral Processing

    Abstract

    The durability of thermal barrier coatings (TBCs) plays an important role in the service reliability and maintainability of hot-section components in advanced turbine engines for aerospace and utility applications. Photostimulated luminescence spectroscopy (PSLS) and electrochemical impedance spectroscopy (EIS) are being concurrently developed as complimentary nondestructive evaluation (NDE) techniques for quality control and life-remain assessment of TBCs. This paper discusses recent achievements in understanding the residual stress, phase constituents, and electrochemical resistance (or capacitance) of TBC constituents-with an emphasis on the thermally grown oxide. Results from NDE by PSLS and EIS are correlated to the nano- and microstructural development of TBCs.

    Journal Title

    Jom

    Volume

    56

    Issue/Number

    10

    Publication Date

    1-1-2004

    Document Type

    Article

    Language

    English

    First Page

    53

    Last Page

    56

    WOS Identifier

    WOS:000224446100012

    ISSN

    1047-4838

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