Crystallization behavior of Ti50Ni25Cu25 amorphous alloy

被引：49
|
作者：
Louzguine, DV [1 ]
Inoue, A [1 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
来源：
JOURNAL OF MATERIALS SCIENCE | 2000年 / 35卷 / 16期
关键词：
Activation energy - Crystallization - Differential scanning calorimetry - Kinetic theory - Mathematical transformations - Nucleation - Numerical analysis - Titanium alloys - Transmission electron microscopy - X ray diffraction analysis;
D O I：
10.1023/A:1004815112497
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crystallization behavior of the Ti50Ni25Cu25 alloy was studied by means of scanning and isothermal differential calorimetry, X-ray diffraction, conventional and high-resolution transmission electron microscopy. A single stage polymorphic-type transformation of the amorphous phase forming a Ti2CuNi crystalline phase was observed. The activation energy for such a single stage crystallization of the amorphous phase was determined by Kissinger analysis. Kinetics of the crystallization was analyzed on the basis of Johnson-Mehl-Avrami equation and discussed regarding to the value of Avrami exponent obtained. Relatively high average value of Avrami exponent of 5.5 at the range from 702 to 709 K suggests nucleation with an increasing nucleation rate. (C) 2000 Kluwer Academic Publishers.
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收藏
页码：4159 / 4164
页数：6
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