Mk. Ferber et al., Application of infrared imaging to the study of controlled failure of thermal barrier coatings, J MATER SCI, 35(11), 2000, pp. 2643-2651
A technique that uses high resolution infrared (IR) imaging was developed t
o track and analyze damage evolution of thermal barrier coatings (TBCs) dur
ing controlled mechanical testing of a TBC specimen. Coating debonding and
spallation were examined during a monotonic load-to-TBC-failure test. The i
nfrared imaging, in concert with a controlled thermal gradient in the speci
men, was particularly effective in identifying and tracking localized damag
e evolution because the damage in the TBC was always associated with a meas
urable surface-temperature change. It is demonstrated that the combined use
of high-resolution infrared imaging and controlled mechanical testing of T
BCs is an effective method to characterize the evolution of their failure.
(C) 2000 Kluwer Academic Publishers.