Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
H trapping and mobility in nanostructured tungsten grain boundaries: a combined
Year:2015
Research Areas
  • Engineering
Information
Abstract
The trapping and mobility of hydrogen in nanostructured tungsten grain boundaries (GBs) have been studied by combining experimental and density functional theory (DFT) data. Experimental results show that nanostructured W coatings with a columnar grain structure and a large number of (1 1 0)/(2 1 1) interfaces retain more H than coarsed grained W samples. To investigate the possible influence of GBs on H retention, a complete energetic analysis of a non-coherent W(1 1 0)/W(1 1 2) interface has been performed employing DFT. Our results show that this kind of non-coherent interface largely attracts point defects (both a H atom and a metallic monovacancy separately) and that the presence of these interfaces contributes to a decrease in the migration energy of the H atoms with respect to the bulk value. When both the W monovacancy and H atom are introduced together into the system, the HV complex becomes the most stable configuration and one of the mechanisms explaining the H retention in the radiation damaged GB observed experimentally.
International
Si
JCR
Si
Title
NUCLEAR FUSION
ISBN
0029-5515
Impact factor JCR
3,243
Impact info
Volume
55
10.1088/0029-5515/55/11/113009
Journal number
From page
113009 1
To page
113009 9
Month
SIN MES
Ranking
Participants
  • Autor: C. González (Departamento de Física, Universidad de Oviedo)
  • Autor: Miguel Panizo Laiz (UPM)
  • Autor: Nuria Gordillo Garcia (UPM)
  • Autor: Carlo Luis Guerrero Contreras (UPM)
  • Autor: Elena Maria Tejado Garrido (UPM)
  • Autor: F. Munnik (Helmholtz-Zentrum Dresden-Rossendorf)
  • Autor: P. Piaggi (Instituto Sábato, UNSAM/CNEA, Argentina)
  • Autor: E. Bringa (Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo)
  • Autor: R. Iglesias (Departamento de Física, Universidad de Oviedo)
  • Autor: Jose Manuel Perlado Martin (UPM)
  • Autor: Raquel Gonzalez Arrabal (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
  • Departamento: Ciencia de Materiales
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)