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Indexed by:期刊论文

Date of Publication:2010-10-28

Journal:PHILOSOPHICAL MAGAZINE

Included Journals:SCIE、EI、Scopus

Volume:90

Issue:30

Page Number:3935-3946

ISSN No.:1478-6435

Key Words:quasicrystals; Al-transition metal alloys; cluster-plus-glue-atom model; cluster formula; electron concentration

Abstract:Compositions of Al-transition metal (TM) binary quasicrystals are revisited using the cluster-plus-glue-atom model. These compositions all conform to a unified cluster formula [icosahedron](glue)1, where the icosahedron is taken from a crystalline approximant. In a given binary system, icosahedral and decagonal quasicrystals are expressed by the same icosahedron but glued, respectively, by one Al and one TM, and their e/a ratios fall close to 1.86 and 1.71-1.79, respectively. Their relative stabilities are discussed by referring to compositions satisfying the fully filled TM-3d states according to Haussler's resonance model.