Phosphor thermometry device for synchronized acquisition of luminescence lifetime decay and intensity on thermal barrier coatings

Fouliard, Quentin; Ghosh, Ranajay; Raghavan, Seetha

Phosphor thermometry device for synchronized acquisition of luminescence lifetime decay and intensity on thermal barrier coatings

Patent · Tue Aug 08 04:00:00 EDT 2023

OSTI ID:2222046

Fouliard, Quentin; Ghosh, Ranajay; Raghavan, Seetha

A phosphor thermometry device includes a laser that generates a laser pulse onto a thermal barrier coating (TBC) applied onto a substrate. A metallic bond coat layer is on the substrate. A ceramic top coat layer is on the bond coat layer and includes an undoped layer and a doped sensing layer having co-doped first and second rare-earth luminescent dopants that emit respective first and second different emission wavelengths upon excitation by the laser pulse. A detector receives reflected, convoluted luminescence signals from the TBC. First and second photomultiplier devices detect respective first and second different emission wavelengths of the convoluted luminescence signals. A controller receives and processes signals generated from respective first and second photomultiplier devices and determines luminescence lifetime decay and intensity variations for each of the respective first and second rare-earth luminescent dopants for temperature monitoring of the TBC.

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Research Organization:: Univ. of Central Florida, Orlando, FL (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FE0031282

Assignee:: University of Central Florida Research Foundation, Inc. (Orlando, FL)

Patent Number(s):: 11,718,917

Application Number:: 17/034,098

OSTI ID:: 2222046

Country of Publication:: United States

Language:: English

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