کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1803583 1024621 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic properties and power losses in Fe–Co-based bulk metallic glasses
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Magnetic properties and power losses in Fe–Co-based bulk metallic glasses
چکیده انگلیسی

Magnetic properties of Fe–Co-based bulk metallic glasses have been experimentally investigated. Samples were prepared by water-cooled Cu-mold injection casting technique. The samples have cylindrical shapes with 0.8 mm diameter and 30 mm length. Amorphous structures were confirmed by the presence of a main halo in X-ray diffraction patterns and by the detection of crystallization signal around 650 °C using differential scanning calorimetry.Owing to their amorphous structure, these materials present good soft magnetic properties with coercivity below 100 A/m and magnetic induction around 1.0 T in quasi-static conditions. Hysteresis loops were measured using a digital wattmeter with controlled induction waveform. Power losses were analyzed for the following compositions: [(Fe1−xCox)75B20Si5]93Nb4Y3 (x=0, 0.2, 0.4, 0.5 and 0.6) over a range of frequencies from 1 to 400 Hz at selected fixed peak inductions. Co addition has shown to improve the soft magnetic properties when x=0.2, 0.4 and 0.5, decreasing coercive fields and power losses, while the magnetic induction is slightly increased (except for x=0.5). Further Co addition (x=0.6) is detrimental for the soft magnetic properties due to the presence of crystalline α-Fe–(Co) and boride phases. The frequency dependence of power losses was described using a separation theory. It has been observed that an f1/2 rule is in good agreement with the experimental data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 20, October 2008, Pages e806–e809
نویسندگان
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