A transient liquid-like phase in the displacement cascades of zircon, hafnon and thorite
dc.contributor.author | Meldrum, A. | en_US |
dc.contributor.author | Zinkle, S. J. | en_US |
dc.contributor.author | Boatner, L. A. | en_US |
dc.contributor.author | Ewing, Rodney C. | en_US |
dc.date.accessioned | 2009-06-01T17:41:03Z | |
dc.date.available | 2009-06-01T17:41:03Z | |
dc.date.issued | 1998-09-03 | en_US |
dc.identifier.citation | Meldrum, A; Zinkle, SJ; Boatner, LA; Ewing, RC. (1998) "A transient liquid-like phase in the displacement cascades of zircon, hafnon and thorite." Nature 395(6697): 56-58. <http://hdl.handle.net/2027.42/62853> | en_US |
dc.identifier.issn | 0028-0836 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/62853 | |
dc.description.abstract | The study of radiation effects in solids is important for the development of 'radiation-resistant' materials for fission-reactor applications'. The effects of heavy-ion irradiation in the isostructural orthosilicates zircon (ZrSiO4), hafnon (HfSiO4) and thorite (ThSiO4) are particularly important because these minerals are under active investigation for use as a waste form for plutonium-239 resulting from the dismantling of nuclear weapons(2-4). During ion irradiation, localized 'cascades' of displaced atoms can form as a result of ballistic collisions in the target material, and the temperature inside these regions may for a short time exceed the bulk melting temperature. Whether these cascades do indeed generate a localized liquid state(5-8) has, however, remained unclear. Here we investigate the irradiation-induced decomposition of zircon and hafnon, and find evidence for formation of a liquidlike state in the displacement cascades. Our results explain the frequent occurrence of ZrO2 in natural amorphous zircong(9-12) Moreover, we conclude that zircon-based nuclear waste forms should be maintained within strict temperature Limits, to avoid potentially detrimental irradiation-induced amorphization or phase decomposition of the zircon. | en_US |
dc.format.extent | 447433 bytes | |
dc.format.extent | 2489 bytes | |
dc.format.mimetype | application/octet-stream | |
dc.format.mimetype | text/plain | |
dc.publisher | Macmillan Magazines Ltd. | en_US |
dc.source | Nature | en_US |
dc.title | A transient liquid-like phase in the displacement cascades of zircon, hafnon and thorite | en_US |
dc.type | Article | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA | en_US |
dc.contributor.affiliationum | Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA | en_US |
dc.contributor.affiliationother | Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA | en_US |
dc.contributor.affiliationother | Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/62853/1/395056a0.pdf | |
dc.identifier.doi | http://dx.doi.org/10.1038/25698 | en_US |
dc.identifier.source | Nature | en_US |
dc.contributor.authoremail | al-m@worldnet.att.net | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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