Crystal structure determination of an Al-Fe-Si-Be phase by convergent-beamelectron diffraction

Authors
Zheng, JG Vincent, R Steeds, JW
Citation
Jg. Zheng et al., Crystal structure determination of an Al-Fe-Si-Be phase by convergent-beamelectron diffraction, PHIL MAG A, 79(11), 1999, pp. 2725-2733
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS ANDMECHANICAL PROPERTIES
ISSN journal
13642804 → ACNP
Volume
79
Issue
11
Year of publication
1999
Pages
2725 - 2733
Database
ISI
SICI code
1364-2804(199911)79:11<2725:CSDOAA>2.0.ZU;2-6
Abstract
The crystal structure of Al-Fe-Si-Be intermetallic precipitates has been in vestigated by transmission electron microscopy and convergent-beam electron diffraction. The precipitates showed Chinese script morphology with the co mposition Al8Fe2SiBe. The crystal structure was bce with a = 1.234 nm, <m(3 )over bar> point group and Im(3) over bar (No. 204) space group. This phase is an approximant to the related icosahedral quasicrystalline phase. X-ray diffraction peaks published previously by Murali et al. (1994, Scripta met all. mater., 29, 1421) are reindexed and the role of Be atoms in crystal gr owth is briefly discussed.