Abstract
Nd 8 Fe 73 Co 5 Hf 2 B 12 alloys were cast as strips (thick continuous ribbons with thickness t=100–160 μm) by a chill disk melt spinning technique (vdisk=3 m/s) from a master alloy prepared by arc melting (A) and from two prealloyed components (B). Samples obtained by the B procedure revealed in the as-cast state, good magnetic properties with an unusually high value of the coercivity, Hc=10.3 kOe, for the substoichiometric Nd2Fe14B system. A high degree of structural refinement and a homogeneous dispersion of the phases are attained in sample B. The strength and type of magnetic interactions between the grains are presented by δM and irreversible susceptibility plots.
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