کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5463584 1517199 2017 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature dependence of resistivity and crystallization behaviors of amorphous melt-spun ribbon of Mg66Zn30Gd4 alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Temperature dependence of resistivity and crystallization behaviors of amorphous melt-spun ribbon of Mg66Zn30Gd4 alloy
چکیده انگلیسی
In this paper, the Mg-based Mg66Zn30Gd4 amorphous ribbons were successfully prepared using a single roller melt-spinning technique. Subsequently, the non-isothermal crystallization behaviors of alloy ribbons were investigated by differential scanning calorimetry (DSC) and resistivity method, and its crystallization process and microstructure were confirmed by X-ray, transmission electron microscope (TEM) and selected area electron diffraction (SAED). The results show that: the negative temperature coefficient of resistivity (TCR) exists in the crystallization process, and the crystallization process of melt-spun Mg66Zn30Gd4 ribbons consists of three steps. The first crystallization reaction at about 385 K is connected with the formation of the ICQ-phase, followed by the formation of the Mg7Zn3 binary phase and the Mg3(Gd, Zn) ternary phase (468-538 K), and then the formation of the α-Mg phase at about 538 K. Furthermore, the formation of the ICQ-phase reflects the heredity of icosahedral local order.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 189, 15 February 2017, Pages 17-20
نویسندگان
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