Crystallization behavior of the Zr61Al7.5Cu17.5Ni10Si4 amorphous alloy

被引：16

作者：

Jang, JSC ^{[1
]}

Chen, YW ^{[1
]}

Chang, LJ ^{[1
]}

Chen, GJ ^{[1
]}

机构：

[1] I SHOU Univ, Dept Mat Sci & Engn, Kaohsiung, Taiwan

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2004年 / 88卷 / 01期

关键词：

amorphous alloy; zirconium-based alloy; crystallization behavior; thermal properties;

D O I：

10.1016/j.matchemphys.2004.07.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ribbons of amorphous Zr61Al7.5Cu17.5Ni10Si4 alloy were studied by means of differential scanning calorimetry (DSC), X-ray diffractometry (XRD), high-temperature optical microscope and transmission electron microscopy (TEM). The activation energy for such the crystallization of the amorphous phase was about 360 and 370 kJ mole(-1) calculated by Kissinger and Avrami plots, respectively. Kinetics for the crystallization was analyzed by means of Johnson-Mehl-Avrami equation and discussed regarding to the value of Avrami exponent. The average value of the Avrami exponent n was measured about 2.43 at the range from 698 to 713 K. In addition, the cube of crystal size as a function of isothermally annealing time presents a linear relationship for the Zr61Al7.5Cu17.5Ni10Si4 alloy. When the Zr61Al7.5Cu17.5Ni10Si4 alloy was isothermally annealed at 698 K, a Zr2Cu crystal with an average size of 105 nm was first observed at the early stage (30% crystallization) of crystallization. In addition, both nano-crystals of ordered fee ZrCu (similar to100 nm) and ordered fee Zr3Al (similar to30 nm) were observed to precipitate from the amorphous matrix upon the middle stage (50% crystallization) of crystallization. (C) 2004 Elsevier B.V All rights reserved.

引用

页码：227 / 233

页数：7

共 22 条

[1] MECHANICAL STRENGTH AND THERMAL-STABILITY OF TI-BASED AMORPHOUS-ALLOYS WITH LARGE GLASS-FORMING ABILITY [J].