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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.43  No.4 (2002)  >  pp.770-772

MATERIALS TRANSACTIONS
<<Previous article Vol.43  No.4 (2002)   pp.770 - 772 Next article>>

New V45Zr20Ni20Cu10Al2.5Pd2.5 Glassy Alloy Powder with Wide Supercooled Liquid Region

M. Sherif El-Eskandarany1) and Akihisa Inoue2)
1) Inoue SuperLiquid Glass Project, Exploratory Research for Advanced Technology, Japan Science and Technology Corporation
2) Institute for Materials Research, Tohoku University


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 ball mill. The glassy powder of the end-product (720 ks) in which its glass transition temperature (Tg) lies at a rather high temperature (745 K), crystallizes through two sharp exothermic reactions at 843 K and 919 K, respectively. The total enthalpy change of crystallization (ΔHx) is −1.78 kJ/mol. The supercooled liquid region before crystallization, ΔTx of the synthesized glassy powder shows a high value (98 K) for a metallic glassy system. The reduced glass transition temperature (ratio between Tg and liquidus temperatures, Tl (TgTl)) was found to be 0.52.


Keyword:
ball milling, mechanical alloying, solid-state reaction; multicomponent metallic glassy material, X-ray diffraction, transmission electron microscope, scanning electron microscope, thermal stability

Received: January 30, 2002
Accepted: February 20, 2002 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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