Adsorption and penetration of hydrogen in W: A first principles study

Amitava Moitra, Kiran Solanki

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

In BCC crystals, such as Tungsten (W), slippage has been observed on the (1 1 0) and (1 1 2) planes. In this work, hydrogen diffusion paths from three different W surfaces ((1 0 0), (1 1 0) and (1 1 2)) have been calculated using first principles density functional theory. Equilibrium sites for H at the surfaces are identified. The energetics for H penetration from the surfaces to the solute site in the bulk is calculated. It is found that for our low surface coverage of H (3.4 × 1014 H/cm2), approximately 2 eV is required for an H atom to penetrate any of the W surfaces considered in this study.

Original languageEnglish (US)
Pages (from-to)2291-2294
Number of pages4
JournalComputational Materials Science
Volume50
Issue number7
DOIs
StatePublished - May 1 2011
Externally publishedYes

Keywords

  • Hydrogen embrittlement
  • Surface adsorption
  • Surface penetration
  • Tungsten

ASJC Scopus subject areas

  • Computer Science(all)
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Computational Mathematics

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