Study of zinc incorporation on the non-isothermal crystallization in glassy selenium using iso-conversional approach

被引:2
|
作者
Dohare, C. [1 ]
Mehta, N. [1 ]
机构
[1] Banaras Hindu Univ, Dept Phys, Glass Sci Lab, Varanasi 221005, Uttar Pradesh, India
关键词
Crystal growth; Activation energy; Glasses; Metals and alloys; ACTIVATION-ENERGY; KINETIC-ANALYSIS; MODEL-FREE; HEATING RATE; TEMPERATURE; PARAMETERS; RATES; END;
D O I
10.1016/j.matlet.2014.09.089
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The crystallization kinetics of glassy Se (g-Se) and glassy Se98Zn2 alloy has been studied by means of differential scanning calorimetric (DSC) technique. lso-conversional methods [Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO), Tang and Straink] were used to determine the various kinetic parameters (i.e. crystallization temperature T-alpha, activation energy of crystallization E-alpha) of crystallization process in non-isothermal mode. The monotonous decrement in activation energy, E-alpha with the extent of conversion, a confirms the complex kinetic mechanism of g-Se and Se98Zn2 alloy. The reaction model, 'Avrami-Erofeev' g(alpha)=[- ln(1 - alpha)](1/n) has been followed to describe the crystallization process with n=1.5 for g-Se and n=2.0 for Se98Zn2 alloy. (C) 2014 Elsevier B.V. All rights reserved,
引用
收藏
页码:171 / 174
页数:4
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