The structure of a Frank-Kasper decagonal quasicrystal in the Zn-Mg-Dy system: comparison with the Al-Ni-Co system

被引：19

作者：

Abe, E ^{[1
]}

Sato, TJ ^{[1
]}

Tsai, AP ^{[1
]}

机构：

[1] Natl Res Inst Met, Tsukuba, Ibaraki 305, Japan

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1998年 / 77卷 / 04期

关键词：

D O I：

10.1080/095008398178525

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure of a new decagonal quasicrystal in the Zn-Mg-Dy system has been studied by transmission electron microscopy and compared with that of a decagonal Al-Ni-Co (d-(Al-Ni-Co)) phase with primitive structure. Electron diffraction patterns of these two d phases reveal the same appearance of the Bragg reflections but with different unit lengths. The characteristic length, in and normal to the quasiperiodic plane, are a = 0.227 nm and c = 0.255 nm for d-(Zn-My-Dy), and n = 0.20 nm and c = 0.20 nm for d-(Al-Ni-Co); the c/a ratios are therefore also different. The local atomic arrangement of the d-(Zn-Mg-Dy) is proposed to be a tetrahedrally close-packed structure.

引用

页码：205 / 211

页数：7

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