Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation
The default theory of radiation damage in graphite invokes Frenkel pair formation as the principal cause of physical property changes. We set out its inadequacies and present two new mechanisms that contribute to a better account for changes in dimension and stored energy. Damage depends on the subs...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/9165 |
| _version_ | 1848745871262351360 |
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| author | Heggie, M. Suarez-Martinez, Irene Davidson, C. Haffenden, G. |
| author_facet | Heggie, M. Suarez-Martinez, Irene Davidson, C. Haffenden, G. |
| author_sort | Heggie, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The default theory of radiation damage in graphite invokes Frenkel pair formation as the principal cause of physical property changes. We set out its inadequacies and present two new mechanisms that contribute to a better account for changes in dimension and stored energy. Damage depends on the substrate temperature, undergoing a change at approximately 250 C. Below this temperature particle radiation imparts a permanent, nano-buckling to the layers. Above it, layers fold, forming what we describe as a ruck and tuck defect. We present first principles and molecular mechanics calculations of energies and structures to support these claims. Necessarily we extend the dislocation theory of layered materials. We cite good experimental evidence for these features from the literature on radiation damage in graphite. |
| first_indexed | 2025-11-14T06:24:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-9165 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:24:14Z |
| publishDate | 2011 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-91652019-02-19T04:26:46Z Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation Heggie, M. Suarez-Martinez, Irene Davidson, C. Haffenden, G. neutron irradiation The default theory of radiation damage in graphite invokes Frenkel pair formation as the principal cause of physical property changes. We set out its inadequacies and present two new mechanisms that contribute to a better account for changes in dimension and stored energy. Damage depends on the substrate temperature, undergoing a change at approximately 250 C. Below this temperature particle radiation imparts a permanent, nano-buckling to the layers. Above it, layers fold, forming what we describe as a ruck and tuck defect. We present first principles and molecular mechanics calculations of energies and structures to support these claims. Necessarily we extend the dislocation theory of layered materials. We cite good experimental evidence for these features from the literature on radiation damage in graphite. 2011 Journal Article http://hdl.handle.net/20.500.11937/9165 10.1016/j.jnucmat.2011.04.015 Elsevier fulltext |
| spellingShingle | neutron irradiation Heggie, M. Suarez-Martinez, Irene Davidson, C. Haffenden, G. Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation |
| title | Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation |
| title_full | Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation |
| title_fullStr | Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation |
| title_full_unstemmed | Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation |
| title_short | Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation |
| title_sort | buckle, ruck and tuck: a proposed new model for the response of graphite to neutron irradiation |
| topic | neutron irradiation |
| url | http://hdl.handle.net/20.500.11937/9165 |