کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
673013 1459477 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Applying Vogel-Fulcher-Tammann relationship in crystallization kinetics of amorphous alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Applying Vogel-Fulcher-Tammann relationship in crystallization kinetics of amorphous alloys
چکیده انگلیسی
The Vogel-Fulcher-Tammann relationship is a generic equation for describing the transport properties of supercooled fragile liquids. Coupling this reasonable equation, a kinetic model is derived in the present work for describing the crystallization kinetics of metallic glass in supercooled liquid region. In the modeling, a constant value for apparent activation energy is substituted by a temperature-dependent one, so that a model is carried forward to describe more general solid-state phase transformation kinetics. Then, recipes of kinetic analysis are proposed, and information about liquid fragility is obtained. Applying the newly proposed model, the evolution of apparent activation energy during the crystallization of many amorphous alloys can be explained. Finally, the crystallization kinetics of Zr55Cu30Al10Ni5 bulk metallic glass, respectively measured by isothermal and non-isothermal differential scanning calorimetry, is studied and interpreted using the present model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 607, 10 May 2015, Pages 9-18
نویسندگان
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