Determination of density and vacancy concentration in rapidly solidified FeAl ribbons

T. Haraguchi, K. Yoshimi, H. Kato, S. Hanada, A. Inoue

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

In order to observe an anomalously large number of thermal vacancies retained in B2-type FeAl, an FeAl alloy is rapidly solidified into ribbons by a conventional melt-spinning technique, and the density and vacancy concentration of these ribbons are determined by an Archimedes water immersion technique and x-ray diffraction method. The lattice constant of as-spun ribbon, which has already B2-type ordered structure regardless of the rapid solidification by melt-spinning, is 2.8992 × 10-10 m. This is smaller than that of water-quenched FeAl alloys previously reported, indicating lattice relaxation due to the existence of numerous thermal vacancies. The total vacancy concentration of as-spun ribbons is estimated to be approximately 1.38±0.15%, which is several hundred times as high as that of pure metals and disordered alloys near the melting point.

Original languageEnglish
Pages (from-to)707-711
Number of pages5
JournalIntermetallics
Volume11
Issue number7
DOIs
Publication statusPublished - 2003 Jul 1

Keywords

  • A. Iron aluminide (based on FeAl)
  • C. Rapid solidification processing
  • D. Defects: point defects

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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