Hexagonal superstructures in the Zn-Mg-rare-earth alloys

被引：51

作者：

Abe, E ^{[1
]}

Takakura, H ^{[1
]}

Singh, A ^{[1
]}

Tsai, AP ^{[1
]}

机构：

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

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 283卷 / 1-2期

关键词：

Zn-Mg-rare-earth alloys; intermetallic phases; superstructure; atomic cluster; HREM;

D O I：

10.1016/S0925-8388(98)00814-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We show that three types of hexagonal Zn-Mg-rare-earth (RE) ternary compound are formed in the vicinity of Zn6Mg3RE1. An electron diffraction study revealed that these phases are related with a lattice parameters by a ratio 3:5:7 but with approximately the same c parameters. A preliminary structural model for the phase with medium a parameter has been proposed by high-resolution electron microscopy, based on the structures of the other two phases recently determined. It is shown that the two-dimensional hexagonal superstructures can be described by two kinds of Zn-Mg clusters A and B, Linked by RE atoms. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：169 / 172

页数：4

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