Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Influence of grain boundaries on the radiation-induced defects and hydrogen in nanostructured and coarse-grained tungsten
Year:2016
Research Areas
  • Physics chemical and mathematical,
  • Engineering
Information
Abstract
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.
International
Si
JCR
Si
Title
Acta Materialia
ISBN
1359-6454
Impact factor JCR
3,94
Impact info
Datos JCR del año 2013
Volume
In revision
Journal number
From page
To page
Month
SIN MES
Ranking
Participants
  • 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)
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Instituto de Fusión Nuclear
  • Departamento: Ingeniería Energética
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)