Patel, M. K. ; Vijayakumar, V. ; Avasthi, D. K. ; Kailas, S. ; Pivin, J. C. ; Grover, V. ; Mandal, B. P. ; Tyagi, A. K. (2008) Effect of swift heavy ion irradiation in pyrochlores Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 266 (12-13). pp. 2898-2901. ISSN 0168-583X
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S01685...
Related URL: http://dx.doi.org/10.1016/j.nimb.2008.03.135
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Pyrochlore; Swift Heavy Ion; Irradiation; Phase Transformations |
| ID Code: | 15780 |
| Deposited On: | 13 Nov 2010 12:33 |
| Last Modified: | 03 Jun 2011 06:46 |
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