The stability of structures with icosahedral local order in Al-based alloys with transition metals

The paper considers the stability of the phases formed in alloys of aluminum with transition metals (TM) in terms of the theory of coordination compounds. The structural stability is related to the degree of distortion of the first-neighbor coordination icosahedra commonly found around TM atoms. Cha...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2003-07, Vol.352 (1), p.100-104
Main Authors: Kiv, A.E, Ezersky, V.I, Talianker, M.M
Format: Article
Language:English
Subjects:
Aluminum-based alloys
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Exact sciences and technology
Icosahedral coordination
Physics
Structural stability
Structure of solids and liquids
crystallography
Theory of crystal structure, crystal symmetry
calculations and modeling
Transition metals
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The paper considers the stability of the phases formed in alloys of aluminum with transition metals (TM) in terms of the theory of coordination compounds. The structural stability is related to the degree of distortion of the first-neighbor coordination icosahedra commonly found around TM atoms. Changes in the symmetry of coordination polyhedrons are explained in terms of the Jahn–Teller theorem. The stability of the structures may be correlated with the effective charge of the TM atom and with the electronegativity of its neighbors: the phase transforms to the structure with lower symmetry when the electronegativity or effective charge decrease.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(02)00862-6