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Heavy-ion irradiation of pyrochlore oxides: Comparison between low and high energy regimes

G. Sattonnay 1 S. Moll 2 L. Thome 3 C. Legros 1 M. Herbst-Ghysel 1 F. Garrido 3 J. M. Costantini 4 C. Trautmann 5
1 ICMMO - Institut de Chimie Moléculaire et des Matériaux d'Orsay
2 CSNSM PCI
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
3 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
4 SRMA - Service des Recherches Métallurgiques Appliquées
5 GSI - Helmholtz Centre for Heavy Ion Research
Abstract : A summary of the results on the radiation stability of pyrochlores (Gd2Zr2O7, Nd2Zr2O7, Gd2Ti2O7) in the electronic stopping regime is given. X-ray diffraction and Raman spectroscopy show a transformation from the ordered pyrochlores (Fd3m) to the anion deficient fluorite (Fm3m) structure in Gd2Zr2O7 or amorphization in Nd2Zr2O7. The track diameter, crystallite size and progression in structural modifications have been monitored. It is found that radiation stability of these pyrochlores depends on the energy to form cation antisites and delocalized anion vacancies. This in turn is correlated to the radius ratio of A-B cations. This criterion for evaluating radiation resistance of pyrochlores has important implications in the field of inert matrix fuels. (C) 2008 Elsevier B.V. All rights reserved.
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Submitted on : Friday, May 24, 2013 - 11:55:04 AM
Last modification on : Wednesday, October 14, 2020 - 4:00:10 AM

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G. Sattonnay, S. Moll, L. Thome, C. Legros, M. Herbst-Ghysel, et al.. Heavy-ion irradiation of pyrochlore oxides: Comparison between low and high energy regimes. 14th International Conference on Radiation Effects in Insulators (REI-14), 2007, Caen, France. pp.3043-3047, ⟨10.1016/j.nimb.2008.03.161⟩. ⟨in2p3-00825666⟩

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