The structure of an Al-Ni-Fe decagonal quasicrystal studied by high-angle annular detector dark-field scanning transmission electron microscopy

Authors
Hiraga, K Ohsuna, T
Citation
K. Hiraga et T. Ohsuna, The structure of an Al-Ni-Fe decagonal quasicrystal studied by high-angle annular detector dark-field scanning transmission electron microscopy, MATER TRANS, 42(5), 2001, pp. 894-896
Citations number
15
Categorie Soggetti
Material Science & Engineering
Journal title
MATERIALS TRANSACTIONS
ISSN journal
13459678 → ACNP
Volume
42
Issue
5
Year of publication
2001
Pages
894 - 896
Database
ISI
SICI code
1345-9678(200105)42:5<894:TSOAAD>2.0.ZU;2-D
Abstract
The structure of an Al-Ni-Fe decagonal phase, which was found as a highly-o rdered decagonal quasierystal H 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 (HAAD F-STEM). It has been found that a large columnar cluster of atoms with a de cagonal section of about 3.2nm in diameter exists as a basic structural uni t. A structural model of the cluster is proposed from HAADF-STEM images.