Diffusion of tritium in intermetallic compound β-LiAl: Relation to the defect structure

Hiroyuki Sugai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The diffusion coefficients (1.0 × 10- 12-4.0 × 10- 11 m2 s- 1) and its activation energy (103.7 ± 9.5 kJ/mol) for tritium in intermetallic compound β-LiAl are determined at temperatures from 699 to 886 K. Though the present result for the diffusion coefficient is almost the same as that reported earlier, the activation energy turns out nearly twice of that (64.9 ± 3.8 kJ/mol) reported earlier. On the basis of the crystal structure and defect structure, the large activation energy of this study suggests that tritium diffuses interstitially and is impeded by an attractive interaction with lithium atoms in lithium sublattices.

Original languageEnglish
Pages (from-to)3507-3512
Number of pages6
JournalSolid State Ionics
Volume177
Issue number39-40
DOIs
Publication statusPublished - 2007 Jan 15

Keywords

  • Activation energy
  • Defect structure
  • Diffusion
  • Fusion reactor
  • Intermetallic compound
  • Lithium aluminide
  • Lithium sublattice
  • Tritium

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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