Composition design and microstructure characterization of Zr-Al-Ni-Cu bulk amorphous alloys

被引：0
|
作者：
Chen, WR [1 ]
Wang, YM
Qiang, JB
Dong, C
机构：
[1] Dalian Univ Technol, Dept Mat Engn, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, Dept Mech Engn, Dalian 116622, Peoples R China
来源：
ACTA METALLURGICA SINICA | 2002年 / 38卷 / 04期
关键词：
Zr base amorphous alloy; electron concentration; atomic size;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Six bull, metallic glass alloys of Zr-Al-Ni-Cu with different compositions were designed according to electron concentration constant and atomic size constant criteria. The cylindrical ingots with top diameter of 3 mm and bottom diameter of 4 mm and length of 30 mm are prepared by suction casting into copper mould. All the samples are mainly in glassy state with large supercooled liquid ranges, high glass transition temperatures and high reduced glass transition temperatures as revealed by DSC and DTA curves. Only two samples with Cu content greater than or equal to 20 (atomic fraction, %) contain a small amount of crystalline phases as proved by XRD and TEAL It is also shown that different phases form at the top and bottom ends of the ingots due to different cooling conditions.
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页码：421 / 426
页数：6
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