Observatorio de I+D+i UPM

Descripción
In order to study the influence of a high grain boundary density on the amount, size and distribution of defects produced by pulsed helium (625 keV) irradiation in tungsten, we have carried out Object Kinetic Monte Carlo (OKMC) simulations in both monocrystalline and nanocrystalline tungsten. The parameterization of the OKMC code (MMonCa) includes binding energies obtained with our in-house Density Functional Theory (DFT) calculations. In the interior of a grain in nanocrystalline tungsten the mixed HenVm clusters are larger and have a lower He/V ratio. Thus, they are less pressurized clusters. The total elastic strain energy remains almost constant with the increasing number of pulses, contrary to its increase in monocrystalline tungsten. A better response to helium irradiation is therefore expected in nanocrystalline tungsten, opening a new path to investigate these nanostructured materials for fusion purposes
Internacional	Si
JCR del ISI	Si
Título de la revista	JOURNAL OF NUCLEAR MATERIALS
ISSN	0022-3115
Factor de impacto JCR	2,016
Información de impacto
Volumen	457
DOI
Número de revista
Desde la página	80
Hasta la página	87
Mes	SIN MES
Ranking

Esta actividad pertenece a memorias de investigación

• Autor: Gonzalo Valles Alberdi (UPM)
• Autor: C. González (Departamento de Física, Universidad de Oviedo)
• Autor: I. Martín-Bragado (IMDEA Materials)
• Autor: R. Iglesias (Departamento de Física, Universidad de Oviedo)
• Autor: Jose Manuel Perlado Martin (UPM)
• Autor: Antonio Juan Rivera de Mena (UPM)

• Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión