HIGHLY ORDERED STRUCTURE OF ICOSAHEDRAL QUASI-CRYSTALS IN ZN-MG-RE (RE-EQUIVALENT-TO-RARE EARTH METALS) SYSTEMS

被引：205

作者：

TSAI, AP ^{[1
]}

NIIKURA, A ^{[1
]}

INOUE, A ^{[1
]}

MASUMOTO, T ^{[1
]}

NISHIDA, Y ^{[1
]}

TSUDA, K ^{[1
]}

TANAKA, M ^{[1
]}

机构：

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

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1994年 / 70卷 / 03期

关键词：

D O I：

10.1080/09500839408240971

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new group of stable icosahedral phases (i-phases) in the Zn-Mg-RE system were found to have an ideal composition close to Zn50 Mg42RE8 (RE = Y, Gd, Tb, Dy, Ho or Er). The new i-phases exhibit a highly ordered and nearly perfect face-centred icosahedral lattice as revealed by electron and X-ray diffraction and high-resolution electron microscopy. Powder X-ray diffraction indicates that the i-phase has long-range structural order with a correlation length over 1000 angstrom, which is the largest found in the Frank-Kasper group. These new i-phases have the common valence concentration (about 2.08) and could be regarded as a new class of Hume-Rothery alloys.

引用

页码：169 / 175

页数：7

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