A thin film coating for phosphor thermography

Phosphor thermography is a laser-induced fluorescence method utilized for the temperature sensing of rotating components within inhospitable environments. Results presented here show that thin film coatings for thermographic sensors have a much higher durability than conventional thick film coatings...

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Bibliographic Details
Published in:Measurement science & technology 1998-12, Vol.9 (12), p.1947-1950
Main Authors: Ranson, R M, Thomas, C B, Craven, M R
Format: Article
Language:English
Subjects:
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
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Summary:Phosphor thermography is a laser-induced fluorescence method utilized for the temperature sensing of rotating components within inhospitable environments. Results presented here show that thin film coatings for thermographic sensors have a much higher durability than conventional thick film coatings. Room-temperature measurements demonstrate that the intensity of the luminescent emission from thin films is equivalent to that from thick films. Lifetime measurements carried out at 1200 deg C show that thin films survived for up to ten hours, whereas thick film samples survived for less than one. More importantly, post-run measurements of thin films indicate little degradation in the intensity of the fluorescent signal. This illustrates the capability of thin film sensors for remote temperature sensing. (Applications noted include measuring temperature of turbine engine components, among others.)
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/9/12/003