New approximant phases in Al-Cr-Fe

被引：26

作者：

Demange, V

Wu, JS

Brien, V

Machizaud, F

Dubois, JM

机构：

[1] Ecole Mines, INPL, CNRS UMR 7584, Sci & Genie Mat Met Lab, F-54042 Nancy, France

[2] Ecole Mines, Ctr Ingn Mat, GDR CINQ, F-54042 Nancy, France

[3] Chinese Acad Sci, Beijing Lab Electron Microscopy, Beijing 100080, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 294卷

关键词：

Al-Cr-Fe approximants; decagonal phase; electron diffraction; unit cells; composition;

D O I：

10.1016/S0921-5093(00)01083-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Recently, new approximant phases were pointed out in the Al-Cr-Fe system, namely orthorhombic O-Al-Cr-Fe, hexagonal H-Al-Cr-Fe and monoclinic M-Al-Cr-Fe. In the corresponding analysed samples, the new approximant phases were always coexisting with metallic aluminium. We have studied the Al-Cr-Fe system within a broad composition range. In one alloy with composition Al81Cr11Fe8, two new crystalline approximants of the decagonal phase were discovered. These phases were analysed by differential thermal analysis (DTA), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and microprobe analysis. The phases were found to be isomorphic with a C-3.1-phase earlier discovered by Van Tendeloo et al. in Al-Mn-Ni and an O-1-phase earlier discovered by Dong et al. in Al-Cr-Cu-Fe. Moreover, we have found in the same sample the O-Al-Cr-Fe phase as well as metallic aluminium. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：79 / 81

页数：3

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