✦ LIBER ✦

Luminescence thermometry for environmental barrier coating materials

✍ Scribed by M.D. Chambers; P.A. Rousseve; D.R. Clarke

Book ID: 104094397
Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 635 KB
Volume: 203
Category: Article
ISSN: 0257-8972
DOI: 10.1016/j.surfcoat.2008.07.028

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✦ Synopsis

The potential for applying luminescence thermometry techniques to two candidate materials for environmental barrier coatings, Y 2 SiO 5 and Y 2 Si 2 O 7 , is investigated. The high temperature luminescence of Eu 3+ doped Y 2 SiO 5 and Y 2 Si 2 O 7 is measured to assess the capability of thermometry based on the decay lifetimes of the rare-earth ions after pulsed laser excitation. The resulting decay profiles and their evolution with temperature are discussed as well as approaches to fitting of the profiles to yield precise, reproducible lifetime values. Lifetime-temperature maps for both materials are presented.

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