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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.42  No.5 (2001)  >  pp.894-896

MATERIALS TRANSACTIONS
<<Previous article Vol.42  No.5 (2001)   pp.894 - 896 Next article>>

The Structure of an Al-Ni-Fe Decagonal Quasicrystal Studied by High-Angle Annular Detector Dark-Field Scanning Transmission Electron Microscopy

Kenji Hiraga1) and Tetsu Ohsuna1)
1) Institute for Materials Research, Tohoku University

The structure of an Al–Ni–Fe decagonal phase, which was found as a highly-ordered decagonal quasicrystal with periodicity of 0.4 nm in an Al71.6Ni23.7Fe4.7 alloy, has been studied by atomic-scale observations of high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). It has been found that a large columnar cluster of atoms with a decagonal section of about 3.2 nm in diameter exists as a basic structural unit. A structural model of the cluster is proposed from HAADF-STEM images.


Keyword:
quasicrystal, decagonal quasicrystal, decagonal phase, high-angle annular detector dark-field scanning transmission electron microscopy, aluminum-nickel-iron

Received: January 29, 2001
Accepted: March 19, 2001 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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