Precipitation of icosahedral phase from a supercooled liquid region in Zr65Cu7.5Al7.5Ni10Ag10 metallic glass

被引:83
作者
Saida, J [1 ]
Matsushita, M
Zhang, T
Inoue, A
Chen, MW
Sakurai, T
机构
[1] Japan Sci & Technol Corp, ERATO, Inoue Superliquid Glass Project, Sendai, Miyagi 9820807, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
关键词
D O I
10.1063/1.125367
中图分类号
O59 [应用物理学];
学科分类号
摘要
The formation of an icosahedral phase from the rapidly quenched Zr65Cu7.5Al7.5Ni10Ag10 metallic glass was confirmed and the kinetics of the precipitation upon isothermal annealing in the supercooled liquid region were examined by differential scanning calorimetry. Based on the kinetic analysis, it is clarified that the precipitation in the supercooled liquid region takes place by an interfacial controlled growth with a nearly steady-state nucleation rate. The Arrhenius plot between effective time lag, tau, of nucleation and isothermal annealing temperature yields a single linear relation, in which the activation energy for nucleation is evaluated to be 366 kJ/mol. It is concluded that the transformation of amorphous to quasicrystal proceeds by a homogeneous nucleation mode, which is different from those of Pd-U-Si and Al-Cu-V quasicrystals arising from an inhomogeneous distribution of quenched-in nuclei. (C) 1999 American Institute of Physics. [S0003-6951(99)04948-7].
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页码:3497 / 3499
页数:3
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