High-Resolution Electron Microscopy and Atomic Arrangements of Al-Mn-Si and Al-Li-Cu Icosahedral Quasicrystals

Kenji Hiraga, Daisuke Shindo

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Two types of icosahedral quasicrystals of Al-Mn-Si and Al-Li-Cu were examined with a 400 kV high-resolution electron microscope having a resolution of 0.17 nm. Their images taken with the incident beam parallel to the fivefold symmetry axis clearly show a structure model formed by the aggregation of atom clusters with icosahedral symmetry. The observed image contrast of Al-Mn-Si was reproduced by an image calculation of the structure model using the multislice method. The calculation demonstrated that high-resolution images taken with the 400 kV electron microscope faithfully represent projected potential of the quasicrystals.

Original languageEnglish
Pages (from-to)567-572
Number of pages6
JournalMaterials Transactions, JIM
Volume31
Issue number7
DOIs
Publication statusPublished - 1990

Keywords

  • aluminum-lithium-copper
  • aluminum-manganesesilicon
  • high-resolution electron microscopy
  • icosahedral quasicrystal
  • quasicrystal

ASJC Scopus subject areas

  • Engineering(all)

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