The structure of an Al-Ni-Co decagonal quasicrystal studied by atomic-scale electron microscopic observations

Authors
Hiraga, K Ohsuna, T
Citation
K. Hiraga et T. Ohsuna, The structure of an Al-Ni-Co decagonal quasicrystal studied by atomic-scale electron microscopic observations, MATER TRANS, 42(3), 2001, pp. 509-513
Citations number
15
Categorie Soggetti
Material Science & Engineering
Journal title
MATERIALS TRANSACTIONS
ISSN journal
13459678 → ACNP
Volume
42
Issue
3
Year of publication
2001
Pages
509 - 513
Database
ISI
SICI code
1345-9678(200103)42:3<509:TSOAAD>2.0.ZU;2-9
Abstract
The structure of an Al-Ni-Cu decagonal phase, which was found as a highly-o rdered decagonal quasicrystal in an Al72Ni20Co8 alloy. has been studied by atomic-scale observations of high-resolution electron microscopy (HREM) and high-angle annular detector dark-field scanning transmission electron micr oscopy (HAADF-STEM), It has been found that a large columnar cluster of ato ms with a decagonal section of about 3.2 nm in diameter exists as a basic s tructural unit. A structural model of the cluster is proposed from HREM and HAADF-STEM images.