The structure and magnetic property for bulk Fe–Zr–Nd–Y–B alloys

The structure and magnetic property for bulk Fe 73− x Zr 2Nd x Y 4B 21 ( x = 0, 2, 5, 7) alloys prepared by suction casting had been investigated. It was found that the bulk amorphous alloys of Fe 73Zr 2Y 4B 21 and Fe 68Zr 2Y 4B 21Nd 5 were obtained. It is noted that the as-cast Fe 68Zr 2Nd 5Y 4B 21 alloy presented soft magnetic behavior, while showed hard magnetic behavior after annealing at temperatures above the crystalline temperature. A bulk permanent magnet was obtained after annealing at 963 K for 30 min, which could provide one promising way for the bulk magnet produced by the simple process of copper mold casting and subsequent heat treatment.