AMORPHOUS AND QUASI-CRYSTALLINE PHASES IN RAPIDLY SOLIDIFIED MG-AL-ZN ALLOYS

被引：17

作者：

NIIKURA, A ^{[1
]}

TSAI, AP ^{[1
]}

NISHIYAMA, N ^{[1
]}

INOUE, A ^{[1
]}

MASUMOTO, T ^{[1
]}

机构：

[1] TOHOKU UNIV, INST MAT RES, SENDAI, MIYAGI 980, JAPAN

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1994年 / 181卷 / pt 2期

关键词：

D O I：

10.1016/0921-5093(94)90870-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The formation of amorphous and icosahedral phases and approximants has been identified in rapidly solidified Mg-Al-Zn alloys. The icosahedral phase is located at the composition range between those of the amorphous phase and approximants. Mg40Al40Zn20 is a cubic 1/1 approximant in the equilibrium state and a cubic 5/3 rational approximant in the rapidly solidified state. Rapidly solidified Mg50Al30Zn20 and Mg50Al20Zn30 have a disordered icosahedral structure with a high density of random phason strain. The valence concentration e/a plays an important role in the selections of rapidly solidified structure between the amorphous and the icosahedral phases and of phason strains between isotropic and anisotropic.

引用

页码：1387 / 1391

页数：5

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