کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458405 | 1516169 | 2017 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystallization kinetics of the Y3Al5O12 glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Crystallization of glass prepared by flame technique from a crystalline YAG precursor synthesized by Pechini method was studied under non-isothermal conditions by differential scanning calorimetry. The crystallization peaks were mathematically deconvoluted into two peaks representing two overlapping thermal effects. These two peaks were examined in terms of the nucleation-growth Johnson-Mehl-Avrami model, autocatalytic Sestak - Berggren model and Malek z(α) and y(α) functions. At lower heating rates, the only process in the system was volume crystallization with the apparent activation energy of 555 ± 37 kJ*molâ1. At higher heating rates, partial change of crystallization mechanism was observed with significant contribution of surface crystallization and the activation energy of 606 ± 31 kJ*molâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 725, 25 November 2017, Pages 792-799
Journal: Journal of Alloys and Compounds - Volume 725, 25 November 2017, Pages 792-799
نویسندگان
Jozef Chovanec, Roman Svoboda, Jozef Kraxner, Andrea Äerná, DuÅ¡an Galusek,