Microstructure and precipitates in Mg-Zn-Y alloys

被引：0
作者：
Zhang, M. [1 ]
Zhang, W. Z. [1 ]
Yuan, G. Y. [2 ]
Zhao, Q. L. [1 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, Adv Mat Lab, Beijing 100084, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Metal Matrix Composites, Shanghai 200030, Peoples R China
来源：
2006 BIMW: 2006 BEIJING INTERNATIONAL MATERIALS WEEK, PTS 1-4: MAGNESIUM | 2007年 / 546-549卷
基金：
中国国家自然科学基金;
关键词：
Mg-Zn-Y alloy; precipitate; microstructure;
D O I：
10.4028/www.scientific.net/MSF.546-549.203
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work studied the precipitate microstructures in as-cast Mg-Zn-Y-Zr alloys. The experimental result showed that there is significant number of small precipitates within the grains besides the icosahedral quasicrystals along the grain boundaries. Among these precipitates, a new phase has been identified. The new phase displays square morphologies with the size in the range of 200 nm to 2 mu m. According to the energy dispersive spectrometer (EDS), this phase could be a metallic Y-riched compound. The diffraction patterns can be indexed with an f.c.c. structure with the lattice parameter a = 0.52 +/- 0.1 nm. The structure does not agree with any precipitate structures that have been reported from the previous studies of Mg-Zn-Y alloys.
引用
收藏
页码：203 / +
页数：2
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