Surface-induced vacancy loops and damage dispersion in irradiated Fe thin films
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http://hdl.handle.net/10045/53253
Título: | Surface-induced vacancy loops and damage dispersion in irradiated Fe thin films |
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Autor/es: | Aliaga Gosálvez, María José | Schäublin, Robin | Löffler, Jörg F. | Caturla, Maria J. |
Grupo/s de investigación o GITE: | Física de la Materia Condensada | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Molecular dynamics simulations | Ion irradiation | In situ transmission electron microscopy | Defects | Microstructure |
Área/s de conocimiento: | Física Aplicada |
Fecha de publicación: | dic-2015 |
Editor: | Elsevier |
Cita bibliográfica: | Acta Materialia. 2015, 101: 22-30. doi:10.1016/j.actamat.2015.08.063 |
Resumen: | Transmission electron microscopy (TEM) in situ ion implantation is a convenient way to study radiation damage, but it is biased by the proximity of the free surfaces of the electron transparent thin sample. In this work this bias was investigated by performing irradiation of Fe in thin foil and bulk form with ions of energies between 50 keV and 100 keV using molecular dynamics simulations. The damage resulting from the subsequent displacement cascades differs significantly between the two sample geometries. The most remarkable difference is in the resulting 〈1 0 0〉 vacancy loops. Both their size and frequency are much greater in thin films, with loops reaching 4 nm in size. This is due to an imbalance between the number of vacancies and self-interstitials produced, since the faster self-interstitials can escape to the surfaces and remain there as ad-atoms. In addition, the self-interstitial clusters are smaller for thin foils and there is a larger dispersion of the induced damage in terms of defect number, defect clustering and defect morphology. The study discusses the impact of these results on the study of radiation effects during in situ experiments. |
Patrocinador/es: | MJA thanks the UA for support through an institutional fellowship. The research leading to these results is partly funded by the European Atomic Energy Community’s (Euratom) Seventh Framework Programme FP7/2007–2013 under Grant agreement No. 604862 (MatISSE project) and in the framework of the EERA (European Energy Research Alliance) Joint Programme on Nuclear Materials and the Generalitat Valenciana PROMETEO2012/011. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under Grant agreement No. 633053. |
URI: | http://hdl.handle.net/10045/53253 |
ISSN: | 1359-6454 (Print) | 1873-2453 (Online) |
DOI: | 10.1016/j.actamat.2015.08.063 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2015 EURATOM. Published by Elsevier Ltd. on behalf of Acta Materialia Inc. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.actamat.2015.08.063 |
Aparece en las colecciones: | INV - Física de la Materia Condensada - Artículos de Revistas INV - Grupo de Nanofísica - Artículos de Revistas Investigaciones financiadas por la UE |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2015_Aliaga_etal_Acta-Materialia_final.pdf | Versión final (acceso restringido) | 2,05 MB | Adobe PDF | Abrir Solicitar una copia |
2015_Aliaga_etal_Acta-Materialia_rev.pdf | Versión revisada (acceso abierto) | 2,43 MB | Adobe PDF | Abrir Vista previa |
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