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Radiation endurance in Al(2)O(3) nanoceramics
The lack of suitable materials solutions stands as a major challenge for the development of advanced nuclear systems. Most issues are related to the simultaneous action of high temperatures, corrosive environments and radiation damage. Oxide nanoceramics are a promising class of materials which may...
Autores principales: | , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5031969/ https://www.ncbi.nlm.nih.gov/pubmed/27653832 http://dx.doi.org/10.1038/srep33478 |
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author | García Ferré, F. Mairov, A. Ceseracciu, L. Serruys, Y. Trocellier, P. Baumier, C. Kaïtasov, O. Brescia, R. Gastaldi, D. Vena, P. Beghi, M. G. Beck, L. Sridharan, K. Di Fonzo, F. |
author_facet | García Ferré, F. Mairov, A. Ceseracciu, L. Serruys, Y. Trocellier, P. Baumier, C. Kaïtasov, O. Brescia, R. Gastaldi, D. Vena, P. Beghi, M. G. Beck, L. Sridharan, K. Di Fonzo, F. |
author_sort | García Ferré, F. |
collection | PubMed |
description | The lack of suitable materials solutions stands as a major challenge for the development of advanced nuclear systems. Most issues are related to the simultaneous action of high temperatures, corrosive environments and radiation damage. Oxide nanoceramics are a promising class of materials which may benefit from the radiation tolerance of nanomaterials and the chemical compatibility of ceramics with many highly corrosive environments. Here, using thin films as a model system, we provide new insights into the radiation tolerance of oxide nanoceramics exposed to increasing damage levels at 600 °C –namely 20, 40 and 150 displacements per atom. Specifically, we investigate the evolution of the structural features, the mechanical properties, and the response to impact loading of Al(2)O(3) thin films. Initially, the thin films contain a homogeneous dispersion of nanocrystals in an amorphous matrix. Irradiation induces crystallization of the amorphous phase, followed by grain growth. Crystallization brings along an enhancement of hardness, while grain growth induces softening according to the Hall-Petch effect. During grain growth, the excess mechanical energy is dissipated by twinning. The main energy dissipation mechanisms available upon impact loading are lattice plasticity and localized amorphization. These mechanisms are available in the irradiated material, but not in the as-deposited films. |
format | Online Article Text |
id | pubmed-5031969 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50319692016-09-29 Radiation endurance in Al(2)O(3) nanoceramics García Ferré, F. Mairov, A. Ceseracciu, L. Serruys, Y. Trocellier, P. Baumier, C. Kaïtasov, O. Brescia, R. Gastaldi, D. Vena, P. Beghi, M. G. Beck, L. Sridharan, K. Di Fonzo, F. Sci Rep Article The lack of suitable materials solutions stands as a major challenge for the development of advanced nuclear systems. Most issues are related to the simultaneous action of high temperatures, corrosive environments and radiation damage. Oxide nanoceramics are a promising class of materials which may benefit from the radiation tolerance of nanomaterials and the chemical compatibility of ceramics with many highly corrosive environments. Here, using thin films as a model system, we provide new insights into the radiation tolerance of oxide nanoceramics exposed to increasing damage levels at 600 °C –namely 20, 40 and 150 displacements per atom. Specifically, we investigate the evolution of the structural features, the mechanical properties, and the response to impact loading of Al(2)O(3) thin films. Initially, the thin films contain a homogeneous dispersion of nanocrystals in an amorphous matrix. Irradiation induces crystallization of the amorphous phase, followed by grain growth. Crystallization brings along an enhancement of hardness, while grain growth induces softening according to the Hall-Petch effect. During grain growth, the excess mechanical energy is dissipated by twinning. The main energy dissipation mechanisms available upon impact loading are lattice plasticity and localized amorphization. These mechanisms are available in the irradiated material, but not in the as-deposited films. Nature Publishing Group 2016-09-22 /pmc/articles/PMC5031969/ /pubmed/27653832 http://dx.doi.org/10.1038/srep33478 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article García Ferré, F. Mairov, A. Ceseracciu, L. Serruys, Y. Trocellier, P. Baumier, C. Kaïtasov, O. Brescia, R. Gastaldi, D. Vena, P. Beghi, M. G. Beck, L. Sridharan, K. Di Fonzo, F. Radiation endurance in Al(2)O(3) nanoceramics |
title | Radiation endurance in Al(2)O(3) nanoceramics |
title_full | Radiation endurance in Al(2)O(3) nanoceramics |
title_fullStr | Radiation endurance in Al(2)O(3) nanoceramics |
title_full_unstemmed | Radiation endurance in Al(2)O(3) nanoceramics |
title_short | Radiation endurance in Al(2)O(3) nanoceramics |
title_sort | radiation endurance in al(2)o(3) nanoceramics |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5031969/ https://www.ncbi.nlm.nih.gov/pubmed/27653832 http://dx.doi.org/10.1038/srep33478 |
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