کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5441161 | 1510374 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sub-Tg annealing effect on the kinetics of glass transition and crystallization for a Ti-Zr-Be-Fe bulk metallic glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The influence of sub-Tg pre-annealing on the kinetics of glass transition and crystallization of a lightweight Ti41Zr25Be28Fe6 bulk metallic glass (BMG) has been investigated by isochronal and isothermal differential scanning calorimetry tests. It was found that sub-Tg annealing obviously enlarges the supercooled liquid region of Ti41Zr25Be28Fe6 BMG, indicating an enhanced thermal stability. The activation energies for glass transition and crystallization of the as-cast and pre-annealed samples have been calculated and compared. The pre-annealed samples possess smaller values of fragility parameter and longer incubation times upon isothermal heating compared with the as-cast sample, indicating a retarded crystallization process. The isothermal crystallization kinetics of the samples with different annealed states has been investigated in terms of the Johnson-Mehl-Avrami equation and local Avrami exponent. The current study reveals a clear sub-Tg annealing effect on the kinetics of glass transition and crystallization of Ti41Zr25Be28Fe6 glassy alloy and the possible mechanisms have also been proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 473, 1 October 2017, Pages 132-140
Journal: Journal of Non-Crystalline Solids - Volume 473, 1 October 2017, Pages 132-140
نویسندگان
Xinyun Wang, Pan Gong, Lei Deng, Junsong Jin, Sibo Wang, Fangwei Li,