کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7995725 | 1516206 | 2016 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-isothermal crystallization kinetics of Mg60Zn30Ti5Si5 amorphous alloy prepared by mechanical alloying
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Mg60Zn30Ti5Si5 amorphous alloy was prepared via mechanical alloying (MA) and heat treated in different way. X-ray diffractometer (XRD) was used to detect the phases of alloy. The crystallization characteristics and kinetics of amorphous alloy were investigated by differential scanning calorimetry (DSC). Tests reveal that raw materials transform to amorphous alloy after 6Â h mechanical alloying; during subsequent heating, MgZn2, Mg2Si and Zn were crystallized in turn. Apparent activation energies (Ea) and local activation energies (El) of non-isothermal crystallization were calculated according to Kissinger and Ozawa models based on DSC data. Results show that Ea3Â >Â Ea2Â >Â Ea1; El1 decreases while El2 increases with crystallization; El3 is almost stable during heating. Avrami parameters (n) indicate that the first devitrification is interface controlled growth and later precipitations are diffusion controlled growth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 687, 5 December 2016, Pages 174-178
Journal: Journal of Alloys and Compounds - Volume 687, 5 December 2016, Pages 174-178
نویسندگان
K. Chen, H.M. Yang, J.S. Gao, X.L. Li, C.G. Yu, G.X. Ma, X. Yuan,