Vacancy clustering and relaxation behavior in rapidly solidified B2 FeAl ribbons

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

研究成果: Article査読

35 被引用数 (Scopus)

抄録

The clustering and relaxation behavior of supersaturated thermal vacancies under annealing at 723 K and subsequent secondary defect formation were investigated in rapidly solidified Fe-40.4, 49.9 and 50.0 at.%Al ribbons by X-ray diffractometry, density measurement, differential scanning calorimetry, scanning electron microscopy, atomic force microscopy and transmission electron microscopy. Supersaturated thermal vacancies of ≈0.3-2.5% were frozen into the as-spun ribbon. Most of the supersaturated vacancies were annihilated during a heat treatment, and the amount of annihilated vacancies was larger for a higher Al content. A large number of mesopores as well as dislocations were observed after the heat treatment, and the size of mesopores increased with increasing Al content. The results obtained suggest that mesopore formation is induced by clustering of supersaturated thermal vacancies. The activation enthalpy and kinetics of the vacancy clustering are discussed.

本文言語English
ページ(範囲)3751-3764
ページ数14
ジャーナルActa Materialia
53
13
DOI
出版ステータスPublished - 2005 8月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • ポリマーおよびプラスチック
  • 金属および合金

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