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Eu 3+ ‐Doped YPO 4 Self‐Monitoring Environmental Barrier Coating
Author(s) -
Liu Wen,
Wang Yiguang,
Cheng Laifei
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04584.x
Subject(s) - luminescence , yttrium , corrosion , europium , materials science , doping , photoluminescence , coating , intensity (physics) , inorganic chemistry , mineralogy , chemistry , metallurgy , composite material , optoelectronics , optics , oxide , physics
Luminescence of europium‐doped yttrium phosphate (YPO 4 :Eu) environmental barrier coatings (EBCs) has been developed as a means of self‐monitoring. The corrosion behavior of YPO 4 :Eu in water vapor and molten salt is investigated as well as the effect of these corrosion environments on the intensity of luminescence. By comparison of these results, the relationship between the extent of corrosion of YPO 4 and the change in luminescence intensity ratio is determined. Preliminary data suggest that the YPO 4 :Eu can monitor the microstructural damages including structural perturbations, phase changes and chemical reactions. The results also indicate that the intensity ratio from luminescence spectra can be used as nondestructive evaluation technology for EBCs.