Investigation of the Al-Cr γ-range

被引：59
|
作者：
Grushko, B [1 ]
Kowalska-Strzeciwilk, E
Przepiórzynski, B
Surowiec, M
机构：
[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany
[2] Silesian Univ, Inst Phys & Chem Met, PL-40007 Katowice, Poland
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 402卷 / 1-2期
关键词：
phase diagram; DTA; XRD; TEM;
D O I：
10.1016/j.jallcom.2005.04.144
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：
The range of Al-Cr between 25 and 50 at.% Cr was reinvestigated by powder X-ray diffractometry, differential thermal analysis, scanning and transmission electron microscopy. Experiments point to the existence of only one high-temperature and one low-temperature phase extending in the compositional range between about 30 and 42 at.% Cr. The low-temperature phase (gamma(2)) has a rhombohedrally distorted gamma-brass structure with alpha < 90 degrees continuously varying with the composition. This phase exhibited twin-oriented domains, which, in turn, consisted of the second-order twins. At 36 at.% Cr and below very fine and periodically arranged stripes were formed, which resulted in additional reflections in the corresponding electron diffraction patterns. (c) 2005 Elsevier B.V All rights reserved.
引用
收藏
页码：98 / 104
页数：7
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