| 摘要 |
PROBLEM TO BE SOLVED: To provide an Fe-base amorphous alloy ribbon reduced in iron loss, by forming an extra thin oxide layer of controlled thickness on the surface of a ribbon and also forming a segregation layer containing at least one or more elements among As, Sb, Bi, Se, and Te on the vicinity of an interface between the oxide layer and an amorphous base phase. SOLUTION: A melt metal is spouted via a pouring nozzle having a slot-like opening onto a moving cooling substrate and rapidly solidified, by which a rapidly quenched metal ribbon is obtained. At this time, the surface of the ribbon, at least on one side, is provided with an extra thin oxide layer; and a segregation layer, containing at least one or more elements among As, Sb, Bi, Se, and Te or containing at least one or more elements among As, Sb, Bi, Se, and Te and further containing either or both of P and S, is provided to the vicinity of the interface between the oxide layer and an amorphous base phase. |
