Phase evolution of Mg-AI-Zr nanophase alloys prepared by mechanical alloying

被引：24

作者：

Al-Aqeeli, N ^{[1
]}

Mendoza-Suarez, G ^{[1
]}

Labrie, A ^{[1
]}

Drew, RAL ^{[1
]}

机构：

[1] McGill Univ, Dept Met & Mat Engn, Montreal, PQ H3A 2B2, Canada

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 400卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

nanostructures; mechanical alloying; X-ray diffraction; intermetallics;

D O I：

10.1016/j.jallcom.2005.03.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al-Mg and Al-Mg-Zr alloys were processed by mechanical alloying. The phase constitution of the powders was strongly dependent on the composition of the starting mixture. In as-milled powders, an Al(Mg) solid solution was formed with up to 40 at% Al, which after annealing transformed to the equilibrium beta-Al3Mg2 phase. For high Mg concentrations (60-90 at%) the dominant phase was gamma-Al12Mg17 in accordance with the equilibrium phase diagram. The addition of Zr led to the appearance of Zr-Al intermetallics causing Mg to precipitate out of the Al(Mg) solution. The effect of zirconium was also to refine the structure and to retard grain growth. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：96 / 99

页数：4

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