Persistence of 5:3 plates in RE5(SixGe1-x)4 alloys

被引：0

作者：

Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, United States ^{[1
]}

不详 ^{[2
]}

机构：

[1] Department of Materials Science and Engineering, Iowa State University, Ames

[2] Ames Laboratory (DOE), Iowa State University, Ames

来源：

J Mater Res | 2006年 / 10卷 / 2669-2674期

关键词：

Rare earth alloys;

D O I：

10.1557/jmr.2006.0326

中图分类号：

学科分类号：

摘要：

Studies of RE5(SixGe1-x)4 alloys, where RE equals rare earth, have revealed a second-phase having a thin-plate morphology in essentially every alloy examined, independent of exact composition and matrix crystal structure. Identified as having a composition approximating Gd5(SixGe1-x)3 and a hexagonal crystal structure in the Gd-based system, it has been suggested that the observed thin-plate second phases seen in this family of rare earth alloys are all most likely of the form RE5(SixGe1-x)3. A number of interesting observations suggest that the formation of these second-phase plates is somewhat unusual. The purpose of this article is to investigate the stability of this second phase in Gd- and Er-based compounds. The stability was investigated as a function of thermal cycling and large-scale composition fluctuations. The results of scanning and transmission electron microscopy (SEM, TEM) studies indicate that the RE5(SixGe1-x)3 phase is extremely stable once it forms in a RE5(SixGe1-x)4 matrix. © 2006 Materials Research Society.

引用

页码：2669 / 2674

页数：5