کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8153069 | 1524761 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hot-compaction of YCo4.8Fe0.2 nanocrystals for metal-bonded magnets
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Metal-bonded magnets based on the nanocrystalline YCo4.8Fe0.2 powder were produced by hot-compaction using a spark plasma-sintering device. Zn and Zn/Al metallic binders with a melting temperature close to 420â¯Â°C were employed to fabricate dense cylindrical magnets. Two different pressures were used for compaction. The higher pressure of 400â¯MPa provided a metal-bonded magnet with Vickers hardness (HV10) of 460â¯Â±â¯20 Vickers units. The temperature coefficients for remanence (α) and coercivity (β) were derived from magnetization measurements in the temperature range 20â¯Â°C-150â¯Â°C. α and β for the Zn/Al-bonded magnet pressed with 400â¯MPa were â0.055%/°C and â0.201%/°C. Scanning electron microscopy revealed 'core-shell'-type microstructure. The pure YCo4.8Fe0.2 phase was detected in the core region whereas the shell was enriched with non-magnetic Zn or Zn/Al phases. High-resolution transmission electron microscope revealed the presence of â¼10â¯Âµm clusters with â¼20â¯nm YCo4.8Fe0.2 grains. In the Zn/Al-bonded magnet pressed at 400â¯MPa, the coercivity μ0Hci, remanent magnetization Ï and energy product (BH)max were 0.87â¯T, 39.3â¯Am2/kg and 23.4â¯kJ/m3, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 460, 15 August 2018, Pages 401-408
Journal: Journal of Magnetism and Magnetic Materials - Volume 460, 15 August 2018, Pages 401-408
نویسندگان
M. Soderžnik, M. Korent, K. Žagar Soderžnik, J.-M. Dubois, P. Tozman, M. Venkatesan, J.M.D. Coey, S. Kobe,