STRUCTURAL MODEL OF A FACE-CENTERED ICOSAHEDRAL PHASE IN AL-MG-LI ALLOYS

被引：9

作者：

TSAI, AP ^{[1
]}

YAMAMOTO, A ^{[1
]}

NIIKURA, A ^{[1
]}

INOUE, A ^{[1
]}

MASUMOTO, T ^{[1
]}

机构：

[1] NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1994年 / 69卷 / 06期

关键词：

D O I：

10.1080/09500839408242443

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A structural model of a face-centred icosahedral quasicrystal in Al-Mg-Li alloys is proposed. It has an ordered arrangement of two icosahedral atom clusters. One consists of 20 Mg and 24 Al and the other contains 20 Li and 24 Al. The clusters are situated at even- and odd-parity twelvefold vertices of the three-dimensional Penrose pattern, forming a face-centred icosahedral structure. The centres of the clusters are linked by three structural units: a prolate rhombohedron with two body diagonal positions occupied by Mg and Li atoms and two rhombic dodecahedra accommodating eight Mg atoms and eight Li atoms. The corresponding 1/1 crystal approximant has the Al24Mg20 cluster at the origin and the Al24Li20 cluster at the body centre and its space group is Pm3.

引用

页码：343 / 349

页数：7

共 15 条

[1] CRYSTAL STRUCTURE OF THE INTERMETALLIC COMPOUND MG32(AL,ZN)49 AND RELATED PHASES [J].