Structural relationship between an icosahedral phase and a 1/1 cubic crystalline approximant in an Al-Li-Cu alloy system, studied by atomic-scale observations of electron microscopy

Toyohiko Konno, T. Ohsuna, K. Hiraga

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

We observed cubic R-phase and icosahedral I-phases in the Al-Li-Cu system by high-resolution transmission electron microscopy (HREM). The images of both the phases taken from three-fold axes showed the presence of the same kind of atom clusters, which are most likely to be the small triacontahedra. The R-phase was found to contain stacking faults along the {110} plane. This stacking fault is created by the insertion of extra atom units, which destroys the symmetry of the lattice, yet the symmetrical configuration of the facing clusters is well preserved.

Original languageEnglish
Pages (from-to)120-125
Number of pages6
JournalJournal of Alloys and Compounds
Volume342
Issue number1-2
DOIs
Publication statusPublished - 2002 Aug 14
EventQC2001 - Sendai, Japan
Duration: 2001 Sep 242001 Sep 28

Keywords

  • Al-Li-Cu system
  • Crystal structure and symmetry
  • Crystalline approximant phase
  • Crystalline quasicrystal
  • Scanning and transmission electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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