Spectral Properties of Dy-Doped Thermal Barrier Sensor Coatings

Conference · Thu Jan 01 00:00:00 EST 2009

OSTI ID:970885

Allison, Stephen W ^[1]; Moore, Danielle ^[1]; Heyes, Andrew ^[2]; Nichols, John R. ^[3]

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1. ORNL
2. Imperial College, London
3. Cranfield University

We have obtained the excitation (484, 497 and 585 nm) and emission (355, 367 and 385 nm) spectra and measured the fluorescence decay lifetimes for partially Y2O3 stabilized ZrO2 thermal barrier coatings doped with 2mol% Dy2O3, as a function of coating depth for thicknesses ranging from 30 to 200 μm. In principle, these coatings can function not only as thermal protection barriers for turbomachinery blades and vanes, but also as remotely interrogated self-sensors for use in determining in situ wear rates during operation. This is done by varying the excitation wavelength and observing the fluorescence decay times and related parameters.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 970885
• Resource Relation: Conference: 55th International Instrumentation Symposium, League City, TX, USA, 20090601, 20090604
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COATINGS
DECAY
EXCITATION
FLUORESCENCE
SPECTRA
THERMAL BARRIERS
TURBOMACHINERY
VANES
WAVELENGTHS