Structure of a metastable Al3Ni decagonal quasicrystal: Comparison with a highly perfect Al72Ni20Co8

Eiji Abe, A. P. Tsai

研究成果: Conference article査読

15 被引用数 (Scopus)

抄録

We study the structure of a decagonal quasicrystalline phase formed in a rapidly-solidified Al3Ni alloy, by using electron diffraction and atomic-resolution Z (atomic number)-contrast scanning transmission electron microscopy (STEM). Electron diffraction patterns of the metastable Al3Ni phase reveal features quite similar to those of the stable Al72Ni20Co8 phase; a large number of reflections in the tenfold symmetry plane and no significant diffuse streaks in the twofold patterns, indicating a good quasiperiodic order of the phase. Z-contrast STEM imaging shows that the structure of the Al3Ni phase can be interpreted based on a decagonal atomic cluster column with broken tenfold symmetry, being basically isostructural with that of the Al72Ni20Co8 phase. Structural disorders are found to be significant at the core of the decagonal atomic clusters in the metastable Al3Ni decagonal phase.

本文言語English
ページ(範囲)96-100
ページ数5
ジャーナルJournal of Alloys and Compounds
342
1-2
DOI
出版ステータスPublished - 2002 8月 14
外部発表はい
イベントQC2001 - Sendai, Japan
継続期間: 2001 9月 242001 9月 28

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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