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Abstract
The alignment of Nd2Fe14B grains (T1) and the microstructure of (Nd,Dy)12.8(Fe,M) 80.7B6.5 strip cast ribbons are reported in this paper. In the strips there is a pronounced texture of the tetragonal T1 phase and the columnar grains exhibit apparent alignment along [00L]. The alignment coefficient ϕ changes with the wheel speed V and is highest at V=1.5–2m/s. The Nd-rich phase is well segregated and widely distributed enclosing the fine columnar grains of the main phase in the strips prepared at V=2m/s. The magnetic properties of sintered magnets prepared from this kind of (Nd,Dy)12.8(Fe,M) 80.7B6.5 strip cast ribbons are as follows: Br=1.457T(14.57kG), Hcj=1048kA/m (BH)max=408kJ/m3 (51.3MGOe).
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