The Mg-Zn-Si system: Constitutional properties and phase formation during mechanical alloying

被引：10
|
作者：
De Negri, S. [1 ]
Skrobanska, M. [1 ]
Delfino, S. [1 ]
Saccone, A. [1 ]
机构：
[1] Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy
来源：
INTERMETALLICS | 2010年 / 18卷 / 09期
关键词：
Ternary alloy systems; Intermetallics; miscellaneous; Phase identification; Phase diagrams; Mechanical alloying and milling; MG2SI; MICROSTRUCTURE; BA;
D O I：
10.1016/j.intermet.2010.05.009
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：
The isothermal section of the Mg-Zn-Si system at 300 degrees C was determined through the characterization of annealed samples by means of scanning electron microscopy, electron probe microanalysis and X-ray powder diffraction. No ternary phases have been detected in this system at 300 degrees C. The Mg2Si phase was found to dissolve about 2 at.% Zn, changing its lattice parameter from a = 0.6347(4) nm to a = 0.6335 (4) mu; the other binary phases do not form detectable solid solutions with the third element. Based on the results obtained on samples subjected to different thermal treatments a U-type invariant equilibrium is proposed to occur in the solid state at 350 < T < 380 degrees C. Mg-Zn-Si powder blends of two different compositions were mechanically alloyed in a planetary ball mill. In both cases the milling process promoted solid state reactions between the constituent elements, leading to the formation of multiphase samples containing crystalline Mg-Si and Mg-Zn binary phases. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1722 / 1728
页数：7
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