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Monitoring the t [arrow right] m Martensitic Phase Transformation by Photoluminescence Emission in Eu^sup 3+^-Doped Zirconia Powders

In this work, we demonstrate that the martensitic t ... m phase transformation of ... powder stabilized with ... and ... ions, can be effectively monitored by photoluminescence (PL) spectroscopy. As the luminescent properties of ... from within a host lattice are strongly influenced by the coordinat...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2013-08, Vol.96 (8), p.2628
Main Authors: Marin, Riccardo, Sponchia, Gabriele, Zucchetta, Enrico, Riello, Pietro, Enrichi, Francesco, De Portu, Goffredo, Benedetti, Alvise
Format: Article
Language:English
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Summary:In this work, we demonstrate that the martensitic t ... m phase transformation of ... powder stabilized with ... and ... ions, can be effectively monitored by photoluminescence (PL) spectroscopy. As the luminescent properties of ... from within a host lattice are strongly influenced by the coordination geometry of the ion, we used the emission spectrum to monitor structural changes of ... We synthesized ...-doped and ...-codoped samples via the coprecipitation method, followed by calcination. We promoted the martensitic transformation by applying mechanical compression cycles with an increasing pressure, and deduced the consequential structural changes from the relative intensities of the ... hypersensitive transitions, centered, respectively, at 606 and 613 nm whether the ... is in the eightfold coordinated site of the tetragonal phase or in the sevenfold coordinated site of the monoclinic phase. We suggest that the unique emission profile for . ions in different symmetry sites can be exploited as a simple analytical tool for remote testing of mechanical components that are already mounted and in use. The structural changes observed by PL spectroscopy were corroborated by X-ray powder diffraction (XRPD), with the phase compositions and volume fractions being determined by Rietveld analysis. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0002-7820
1551-2916