ELECTRON-DIFFRACTION STUDIES OF THE DECAGONAL PHASE AND ITS CRYSTAL APPROXIMANTS IN AL-NI-CO ALLOYS

被引：7

作者：

EDAGAWA, K

ICHIHARA, M

SUZUKI, K

TAKEUCHI, S

机构：

[1] Institute for Solid State Physics, The University of Tokyo, Minato-ku, Tokyo, 106, Roppongi

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1993年 / 153卷

关键词：

D O I：

10.1016/0022-3093(93)90306-I

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：

Structures of alloys with compositions Al70Ni15Co13, Al70Ni15Co15 have been studied by electron diffraction after being subjected to various heat treatments. A new type of decagonal phase has been found. The phase can be regarded as having the structure in which a superlattice order is introduced into that of the decagonal phase reported so far. Four types of approximant crystalline phases have been identified, which have often been observed to form (micro-)twins. It has been found that the amount of the approximant phases is larger in the sample annealed at a high temperature of 900-degrees-C than in those annealed at 800 or 600-degrees-C.

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页码：19 / 23

页数：5

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