Title :
Time-domain terahertz mapping of thickness and degradation of aircraft turbine blade thermal barrier coatings
Author :
White, Jeffrey ; Fichter, G. ; Chernovsky, A. ; Zimdars, David ; Whitaker, John F. ; Das, D. ; Pollock, Tresa M.
Author_Institution :
Picometrix, LLC, Ann Arbor, MI
Abstract :
Time domain terahertz (TD-THz) non destructive evaluation (NDE) imaging is used to two-dimensionally map the thickness of yttria stabilized zirconia (YSZ) thermal barrier coatings (TBC) on aircraft engine turbine blades. Indications of thermal degradation can be seen. The method is non-contact, rapid, and requires no special preparation of the blade.
Keywords :
aerospace engines; aerospace materials; blades; nondestructive testing; submillimetre wave imaging; thermal barrier coatings; turbines; yttrium compounds; zirconium compounds; NDE imaging; ZrO2-Y2O3; aircraft engine turbine blade; noncontact method; nondestructive evaluation; thermal barrier coatings; thermal degradation; time-domain terahertz mapping; two-dimensionally map; yttria stabilized zirconia thickness; Aircraft; Blades; Coatings; Thermal degradation; Time domain analysis; Turbines; 110.6880 Three-dimensional image acquisition; 320.7080 Ultrafast devices;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
