Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore
© 2016 The American Ceramic Society. All rights reserved. We performed systematic ab initio atomistic simulations of monazite (LnPO4) and pyrochlore (A2B2O7 )-type ceramics. The simulated properties include the thermodynamic parameters, the threshold displacement energies, the elastic constants and...
| Main Authors: | , , , , , , , |
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| Format: | Book Chapter |
| Published: |
John Wiley & Sons
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/63220 |
| _version_ | 1848761026761195520 |
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| author | Li, Y. Kowalski, P. Beridze, G. Blanca-Romero, A. Ji, Y. Vinograd, V. Gale, Julian Bosbach, D. |
| author_facet | Li, Y. Kowalski, P. Beridze, G. Blanca-Romero, A. Ji, Y. Vinograd, V. Gale, Julian Bosbach, D. |
| author_sort | Li, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2016 The American Ceramic Society. All rights reserved. We performed systematic ab initio atomistic simulations of monazite (LnPO4) and pyrochlore (A2B2O7 )-type ceramics. The simulated properties include the thermodynamic parameters, the threshold displacement energies, the elastic constants and the energies of defects formation. We computed the excess effects of mixing in various monazite-type solid solutions and provided crucial information on their thermodynamic stability. To better understand the radiation damage resistance of the considered novel waste forms, we simulated the threshold displacement energies and the displacement probabilities of La cation in LaPO4 monazite and computed defect formation energies in various pyrochlore compounds. The observed exothermic character of the anion Frenkel pair defects suggests that the ease of the defect formation correlates with instability of the pyrochlore structure relative to fluorite. Further calculations of activation barriers for the oxygen migration shed a light on the mechanism of the order-disorder transition in pyrochlore compounds. |
| first_indexed | 2025-11-14T10:25:08Z |
| format | Book Chapter |
| id | curtin-20.500.11937-63220 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:25:08Z |
| publishDate | 2016 |
| publisher | John Wiley & Sons |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-632202018-02-06T06:23:50Z Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore Li, Y. Kowalski, P. Beridze, G. Blanca-Romero, A. Ji, Y. Vinograd, V. Gale, Julian Bosbach, D. © 2016 The American Ceramic Society. All rights reserved. We performed systematic ab initio atomistic simulations of monazite (LnPO4) and pyrochlore (A2B2O7 )-type ceramics. The simulated properties include the thermodynamic parameters, the threshold displacement energies, the elastic constants and the energies of defects formation. We computed the excess effects of mixing in various monazite-type solid solutions and provided crucial information on their thermodynamic stability. To better understand the radiation damage resistance of the considered novel waste forms, we simulated the threshold displacement energies and the displacement probabilities of La cation in LaPO4 monazite and computed defect formation energies in various pyrochlore compounds. The observed exothermic character of the anion Frenkel pair defects suggests that the ease of the defect formation correlates with instability of the pyrochlore structure relative to fluorite. Further calculations of activation barriers for the oxygen migration shed a light on the mechanism of the order-disorder transition in pyrochlore compounds. 2016 Book Chapter http://hdl.handle.net/20.500.11937/63220 10.1002/9781119234531.ch15 John Wiley & Sons restricted |
| spellingShingle | Li, Y. Kowalski, P. Beridze, G. Blanca-Romero, A. Ji, Y. Vinograd, V. Gale, Julian Bosbach, D. Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore |
| title | Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore |
| title_full | Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore |
| title_fullStr | Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore |
| title_full_unstemmed | Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore |
| title_short | Atomistic Simulations of Ceramic Materials Relevant for Nuclear Waste Management: Cases of Monazlte and Pyrochlore |
| title_sort | atomistic simulations of ceramic materials relevant for nuclear waste management: cases of monazlte and pyrochlore |
| url | http://hdl.handle.net/20.500.11937/63220 |