QUASI-CRYSTALS AND APPROXIMANTS IN THE AL-CU-(FE,RU) AND AL-PD-MN SYSTEMS

被引：17
|
作者：
WASEDA, A
ARAKI, K
KIMURA, K
INO, H
机构：
[1] Department of Materials Science, Faculty of Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 1993年 / 153卷
关键词：
D O I：
10.1016/0022-3093(93)90430-6
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The formation and thermal stability of a quasicrystal and its approximant have been investigated in the ternary Al-Cu-(Fe,Ru) and Al-Pd-Mn systems. In the Al-Cu-Fe system, the rhombohedral approximant is observed with microcrystalline or a coarse-grained structure, depending on the annealing temperature. Also the intermediate state with tau almost-equal-to 1.75 is observed in Al62Cu26Fe12. In the Al-Cu-Ru system, the icosahedral phase is observed in two different compositional regions, which satisfy the condition e/a = 1.75. The 1/0 cubic approximant is found at the composition of Al71Cu7Ru22. In the Al-Pd-Mn system, the icosahedral and decagonal phases as well as their approximants are observed.
引用
收藏
页码：635 / 639
页数：5
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