Title

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

Authors

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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