Nanocrystallization Behavior and Soft Magnetic Properties of FeSiBCu(C) Amorphous Alloy

سال انتشار: 1402
محل انتشار: سومین همایش بین المللی تحقیقات در علوم و فناوری نانو
کد COI اختصاصی: ICNNA03_055
زبان مقاله: انگلیسی
تعداد مشاهده: 208

نویسندگان

Department of Physics, Bu-Ali Sina University, Hamedan ۶۵۱۷۴‑۴۱۶۱, Iran

چکیده

Developing Fe-based nanocrystalline alloys with high saturation flux density (Bs) is essential for a wide range of technologies. In present work, effects of minor C addition as well as stress-relaxation treatment on nanocrystallization and magnetic properties of Fe-based amorphous alloys were systematically studied. For this reason, Fe۸۳.۳Si۴B۱۲Cu۰.۷ and Fe۸۲.۳Si۴B۱۲Cu۰.۷C۱ amorphous ribbons were produced by melt spinning process and were subjected to heat treatment at a temperature of ۶۴۰ K for ۱ hour. The crystallization temperatures were derived by DSC technique. Structural investigations performed at room temperature X-ray diffractometry confirmed amorphous nature of the as-spun ribbons and the presence of α-Fe nanocrystalline phases embedded in amorphous matrix in annealed ones. Using VSM technique, it has been found that although the addition of C decreases the value of Bs somewhat, the C-containing alloy still shows good magnetic properties, including relatively high Bs (۱۳۳ emu/g) and low coercivity (۰.۳ G). The saturation magnetization of relaxed annealed samples increased significantly (۱۵۳ emu/g and ۱۸۴.۵ emu/g for C-free and C-containing alloys, respectively) while Hc had a tendency to decrease. Improved soft magnetic properties after annealing could be attributed to the α-Fe nanocrystalline phases which were separated out, in addition to chemical rearrangement of atoms and annihilation of free-volume.

کلیدواژه ها

Nanomaterials, Amorphous, nanocrystallization, magnetic properties, heat treatment

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