Effect of excess vacancies on hydrogen absorption-desorption characteristics in rapidly solidified B2 TiCo

Minseok Sung, Tomohide Haraguchi, Kyosuke Yoshimi, Shuji Hanada

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

Rapidly-solidified ribbons of B2 TiCo were produced by a twin-roll method. Some of the ribbons were annealed at 973 K for 12 h in a vacuum. It is confirmed by XRD that the as-spun ribbons already have the B2 structure. The lattice parameter of as-spun ribbons is increased from 2.9905 Å to 2.9931 Å by annealing at 973 K for 12 h, indicating that thermal vacancies retained in the as-spun ribbons by the rapid solidification were removed out during the heat treatment. Pressure-composition isotherms were measured for both the as-spun and annealed ribbons attemperature from 403 K to 473 K using an automatic Sieverts' type apparatus. The variation in hydrogen absorption capability dependent on lattice parameter change is found in the as-spun and annealed ribbons. Although both of the as-spun and annealed ribbons have almost the same lattice parameters, hydrogenation characteristics are clearly different between them.

Original languageEnglish
Pages (from-to)3727-3732
Number of pages6
JournalMaterials Science Forum
Volume426-432
Issue number4
DOIs
Publication statusPublished - 2003
EventThermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, Spain
Duration: 2003 Jul 72003 Jul 11

Keywords

  • B2 structure
  • Hydrogenazation
  • Lattice parameter
  • PCT
  • Rapid solidification
  • TiCo
  • Vacancy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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