Artículos en revistas:
Influence of grain boundaries on the radiation-induced defects and hydrogen in nanostructured and coarse-grained tungsten
Influence of grain boundaries on the radiation-induced defects and hydrogen in nanostructured and coarse-grained tungsten
Año:2016
Áreas de investigación
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Física química y matemáticas, -
Ingenierías
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Descripción
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| We have studied the influence of grain boundaries (GBs) on the radiation-induced defect evolution and on H retention at 300 K, both experimentally and by computer simulations. For this purpose, coarse-grained tungsten (CGW) and nanostructured tungsten (NW) samples were implanted with H and C ions at energies of 170 keV and 665 keV respectively. Three different sets of experiments were carried out: (i) H single implantation, (ii) C and H co-implantation and (iii) C and H sequential implantation. Computer simulations were performed by using the Object Kinetic Monte Carlo (OKMC) methodology, which was parameterized by new and pre-existing Density Functional Theory (DFT) data. The three sets of experiments were simulated resulting that (i) GBs have a clear influence on the amount and distribution of vacancies, being the vacancy concentration larger in NW than in CGW samples, (ii) H retention is highly influenced by both the GBs themselves and the vacancy concentration, (iii) the size of HnVm clusters is slightly influenced by the presence of GBs and (iv) it can be inferred, from the comparison between experimental and computational results, that GBs act as preferential paths for H diffusion. | |
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Internacional
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JCR del ISI
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Título de la revista
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Acta Materialia |
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ISSN
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1359-6454 |
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Factor de impacto JCR
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3,94 |
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Información de impacto
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Volumen
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DOI
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In revision |
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Número de revista
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Participantes
- Autor: Gonzalo Valles Alberdi (UPM)
- Autor: Miguel Panizo Laiz (UPM)
- Autor: Cesar González (Universidad de Oviedo)
- Autor: Ignacio Martín-Bragado (IMDEA Materials)
- Autor: Raquel Gonzalez Arrabal (UPM)
- Autor: Nuria Gordillo Garcia (UPM)
- Autor: Roberto Iglesias (Universidad de Oviedo)
- Autor: Carlo Luis Guerrero Contreras (UPM)
- Autor: Jose Manuel Perlado Martin (UPM)
- Autor: Antonio Juan Rivera de Mena (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
- Creador: Centro o Instituto I+D+i: Instituto de Fusión Nuclear
- Departamento: Ingeniería Energética
S2i 2023 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)