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Artículos en revistas:
Experimental and computational studies of the influence of grain boundaries and temperature on the radiation-induced damage and hydrogen behavior in tungsten
Año:2019
Áreas de investigación
  • Física
Datos
Descripción
We study the influence of grain boundaries (GBs) on radiation-induced vacancies, as well as on the hydrogen (H) behavior in tungsten (W) samples with different grain sizes in the temperature range from 300 K to 573 K, both experimentally and by computer simulations. For this purpose, coarse-grained and nanostructured W samples were sequentially irradiated with carbon (C) and H ions at energies of 665 keV and 170 keV, respectively. A first set of the implanted samples was annealed at 473 K and a second set at 573 K. Object kinetic Monte Carlo simulations were performed to account for experimental outcomes. Results show that the number of vacancies for nanostructured W is always larger than for monocrystalline W samples in the whole studied temperature range and that the number of vacancies is only reduced in samples with a large density of grain boundaries and at temperatures high enough to activate the vacancy motion (around 573 K). Results also indicate that the migration of H along vacancy free grain boundaries is more effective than along the bulk, and that the retained H is trapped in vacancies located within the grains. These results are used to explain the experimental outcomes.
Internacional
Si
JCR del ISI
Si
Título de la revista
Nuclear Fusion
ISSN
0029-5515
Factor de impacto JCR
4,057
Información de impacto
Datos JCR del año 2017
Volumen
59
DOI
10.1088/1741-4326/ab26e9
Número de revista
8
Desde la página
0
Hasta la página
12
Mes
AGOSTO
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Miguel Panizo Laiz (UPM)
  • Autor: Pablo Diaz Rodriguez (UPM)
  • Autor: Antonio Juan Rivera de Mena (UPM)
  • Autor: Gonzalo Valles Alberdi (UPM)
  • Autor: I Martín Bragado (UCAM, Universidad Católica de Murcia)
  • Autor: Jose Manuel Perlado Martin (UPM)
  • Autor: F Munnik (Helmholtz-Zentrum Dresden-Rossendorf)
  • Autor: Raquel Gonzalez Arrabal (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Departamento: Ingeniería Energética
  • Departamento: Física Aplicada e Ingeniería de Materiales
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear "Guillermo Velarde"
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