New V45Zr20Ni20Cu10Al2.5Pd2.5 glassy alloy powder with wide supercooled liquid region

被引：7
作者：
El-Eskandarany, MS [1 ]
Inoue, A
机构：
[1] Japan Sci & Technol Corp, Exploratory Res Adv Technol, Inoue Super Liquid Glass Project, Sendai, Miyagi 9820807, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
MATERIALS TRANSACTIONS | 2002年 / 43卷 / 04期
关键词：
ball milling; mechanical alloying; solid-state reaction; multicomponent metallic glassy material; X-ray diffraction; transmission electron microscope; scanning electron microscope; thermal stability;
D O I：
10.2320/matertrans.43.770
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
New multicomponent V-based glassy alloy powder has been synthesized by mechanical alloying a mixture of elemental V45Zr20Ni20Cu10Al2.5Pd2.5 powder at room temperature, using a low energy bull mill. The glassy powder of the end-product (720ks) in which its glass transition temperature (T-g) lies at a rather high temperature (745 K). crystallized through two sharp exothermic reactions at 843K and 919K, respectively. The total enthalpy change of crystallization (DeltaH(x)) is -1.78 kJ/mol. The supercooled liquid region before crystallization, DeltaT(x) of the synthesized glassy powder shows a high value (98 K) for a metallic glassy system. The reduced glass transition temperature (ratio between T-g and liquidus temperatures. T-l (T-g/T-l)) was found to be 0.52.
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页码：770 / 772
页数：3
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