Amorphization, Crystallization, and Magnetic Properties of Melt-Spun Alloys
作者： Liya Li , Wei Xie
DOI: 10.1155/2011/910268
关键词: Remanence 、 Annealing (metallurgy) 、 Coercivity 、 Ribbon 、 Grain size 、 Analytical chemistry 、 Crystallization 、 Melt spinning 、 Amorphous solid 、 Materials science 、 Crystallography
摘要: Effects of Cr3C2 content and wheel surface speed on the amorphous formation ability magnetic properties have been investigated for melt-spun () alloys. Ribbon at lower (30 m/s) has composite structure composed mostly SmCo7, a small amount Sm2Co17, residual phases. The grain size SmCo7 phase decreases with increase . When melt spinning 40 m/s, alloys can be obtained in state intrinsic coercive order 40–70 Oe. DSC analysis reveals that first precipitates from matrix 650∘C, followed by crystallization Sm2Co17 770∘C. Optimal coercivity 7.98 kOe remanent magnetization 55.05 emu/g realized magnet subjected to 40 m/s annealing 650∘C 5 min. domain annealed ribbon is interaction domains typically 100–400 nm size, which indicates presence strong exchange coupling between grains.
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