| 简介 |
PROBLEM TO BE SOLVED : To provide a magnetic member capable of obtaining a rare earth magnet with high coercive force even in high temperature environment, a powder compact suitable for a raw material of the magnetic member, and a powder for the magnetic member with high moldability.
SOLUTION : Each magnetic particle 1 constituting the powder for the magnetic member consists of a hydride (NdH2) 3 of a rare earth element of less than 40 volume % and an iron-containing material 2 containing Fe and Fe-B alloy as the remainder. The hydride 3 is discretely in the phases of the iron-containing material 2. The surface of the magnetic particle 1 has a supply source particle 4a consisting of a rare earth supply source material (for example, hydride : DyH2) containing a rare earth element and a heat-resistant precursive layer 4 including a resin layer 4b consisting of a resin with a small oxygen transmission coefficient. Uniform presence of the phases of the iron-containing material 2 in the magnetic particle 1 enhances moldability of the powder. Heat treatment of the powder compact formed by the powder with the heat-resistant precursive layer 4 can obtain the magnetic member with the heat-resistant coercive force layer 6 formed on the surface of an alloy particle 5. The magnetic member can obtain a rare earth magnet with high coercive force even in high temperature environment.
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