Precipitation of quasicrystal approximant phases in an Al-Mg-Cu-Ge alloy

被引：5

作者：

Xia, J. H. ^{[1
]}

Sha, G. ^{[1
,2
]}

Chen, Z. G. ^{[3
]}

Liao, X. Z. ^{[1
]}

Liu, H. W. ^{[4
]}

Ringer, S. P. ^{[1
,2
,4
]}

机构：

[1] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

[2] Univ Sydney, ARC Ctr Excellence Design Light Met, Sydney, NSW 2006, Australia

[3] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[4] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2013年 / 93卷 / 02期

关键词：

aluminium alloys; ageing; quasicrystal approximant; phase transformations; transmission electron microscopy; MASS-PERCENT ALLOY; METALLIC PHASE; AG ALLOY; QUASICRYSTAL; PARTICLES; SYMMETRY; SI;

D O I：

10.1080/09500839.2012.745016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cube-shaped precipitates in the peak-aged Al4.0Mg1.5Cu0.25Ge (wt.%) alloy were found to exhibit a pseudo five-fold symmetry in their electron diffraction patterns along the ?110? and ?113? zone axes of the Al matrix. These strengthening precipitates, designated as the Z, possess a structure in a transition state from an icosahedral quasicrystal phase to a face-centred cubic (FCC) quasicrystal approximant phase. After prolonged ageing, the Z phase transforms into the FCC equilibrium Z phase having atoms in a periodic icosahedral arrangement.

引用

页码：77 / 84

页数：8

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