超急冷法で作製した Sm-Co 合金薄帯の磁気特性

抄録

By rapid quenching techiques directly from the liquid, Sm-Co binary ribbons were produced over the range 20∼39wt% Sm. The samples were melted and quenched in Ar gas atomosphere in order to avoid oxidation. The continuous ribbons obtained were 20 to 50 μm in thickness, 1 to 3 mm in width and about 1 m in length. These ribbons were flexible, and it was possible to wind around a rod 8 mm in diameter. The coercivities of as-quenched Sm-Co ribbons for Sm content > 34 wt% (the stoichiometric content of SmCo₅) were almost the same as the sintered SmCo₅ magnets. In the case of Sm content < 34 wt%, the coercivities of Sm-Co ribbons were higher than those of sintered Sm-Co systems.