THE FE-NB DECAGONAL PHASE AND ITS STRUCTURE MODEL

被引：9

作者：

HE, AQ

YANG, QB

YE, HQ

机构：

[1] Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Shenyang

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1990年 / 61卷 / 02期

基金：

英国医学研究理事会; 英国经济与社会研究理事会;

关键词：

D O I：

10.1080/09500839008206482

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A tenfold diffraction pattern has been observed in a rapidly solidified Nbl8Fe52alloy by transmission electron microscopy. This tenfold diffraction pattern has many fewer diffraction spots than that of an Al-TM (transition metal) decagonal phase, but tilting experiments through 90° apparently show that it exhibits decagonal symmetry. High-resolution electron microscopy images corresponding to the tenfold diffraction pattern shows that it comes from an aperiodic arrangement of icosahedral chains in real space. The structure factors which are calculated according to the ideal model and real model are nearly consistent with the experimental results. It is suggested that this is a new type of decagonal phase closely related to the Zr4Al3and MgCu2units of pentagonal Frank-Kasper phases. © 1990 Taylor & Francis Group, LLC.

引用

页码：69 / 75

页数：7

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