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
相关论文
共 13 条
[1]  
BELLEN P, TERNARY ALLOYS COMPR, V18, P68
[2]   The role of Mg2Si on the corrosion behavior of wrought Mg-Zn-Mn alloy [J].
Ben-Hamu, G. ;
Eliezer, D. ;
Shin, K. S. .
INTERMETALLICS, 2008, 16 (07) :860-867
[3]   The effect of Ba on the microstructure and age hardening of an Mg-Zn alloy [J].
Buha, J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 491 (1-2) :70-79
[4]   The intermetallic compound Mg21Zn25 [J].
Cerny, R ;
Renaudin, G .
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 2002, 58 (11) :i154-i155
[5]   The effect of Ba addition on microstructure of in situ synthesized Mg2Si/Mg-Zn-Si composites [J].
Chen, K. ;
Li, Z. Q. ;
Liu, J. S. ;
Yang, J. N. ;
Sun, Y. D. ;
Bian, S. G. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 487 (1-2) :293-297
[6]   Modification of Mg2Si in Mg-Si alloys with yttrium [J].
Jiang, QC ;
Wang, HY ;
Wang, Y ;
Ma, BX ;
Wang, JG .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 392 (1-2) :130-135
[7]   Mg-based composite reinforced byMg2Si [J].
Lu, L ;
Thong, KK ;
Gupta, M .
COMPOSITES SCIENCE AND TECHNOLOGY, 2003, 63 (05) :627-632
[8]  
Massalski T. B., 1990, BINARY ALLOY PHASE D, V1
[9]   Microstructural formation in a hypereutectic Mg-Si alloy [J].
Pan, YC ;
Liu, XF ;
Yang, H .
MATERIALS CHARACTERIZATION, 2005, 55 (03) :241-247
[10]   Thermodynamic assessment of the Si-Zn, Mn-Si, Mg-Si-Zn and Mg-Mn-Si systems [J].
Shukla, Adarsh ;
Kang, Youn-Bae ;
Pelton, Arthur D. .
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2008, 32 (03) :470-477
12