کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1531320 | 995830 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal stability and electrode properties of melt-spun Mg65Cu25Nd10 amorphous alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Amorphous Mg-based alloy Mg65Cu25Nd10 was prepared by melt-spinning. Thermal stability and phase transition in the as-quenched alloy were studied by TEM, DSC, X-ray and electron diffraction. It was found that the crystallization process of melt-spun Mg65Cu25Nd10 ribbons consists of three steps. The first crystallization reaction at about 180 °C is connected with the formation of Mg2Cu nanocrystalline phase, followed by formation of a coarser grained α-Mg crystalline phase (210-225 °C) corresponding to a second crystallization reaction. At higher temperatures a third exothermic effect (at about 320 °C) can be detected and the stable Mg2Cu, α-Mg and Cu5Nd phases are present. The electrode properties of the as-quenched and the annealed samples (partially and fully crystallized) were measured and compared as well. The amorphous Mg65Cu25Nd10 alloy shows the highest discharge capacity (430.4 mAh/g) and the best life cycle properties in comparison with those of partially crystalline (421.8 mAh/g) and almost completely crystallized microstructural states (304.3 mAh/g). It was conformed that the discharge capacity is significantly dependent on the composition and microstructure of the electrode materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 141, Issue 3, 15 August 2007, Pages 121-125
Journal: Materials Science and Engineering: B - Volume 141, Issue 3, 15 August 2007, Pages 121-125
نویسندگان
L.J. Huang, G.Y. Liang, Z.B. Sun, Y.F. Zhou, D.C. Wu,