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

fYear

2008

fDate

4-9 May 2008

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

iet

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

Type

conf

Filename

4571743