| 摘要 |
Disclosed are: a powder for a magnet, which can be used for the production of a rare earth magnet having excellent magnet properties and has excellent moldability; a process for producing the powder; a powder molded article, a rare earth-iron-based alloy material, a rare earth-iron-nitrogen-based alloy material which can be used as raw materials for the magnet; and processes for producing the powder and the alloy materials. Each of magnetic particles (1) that constitute the powder for a magnet has such a structure that particles of a phase (3) of a hydrogen compound of a rare earth element are dispersed in a phase (2) of an iron-containing material such as Fe. In the powder, the phase (2) of the iron-containing material is present in each of the magnetic particles (1) homogeneously. Therefore, the powder has excellent moldability and enables the production of a powder molded article (4) having a high relative density. The powder for a magnet is produced by heating a rare earth-iron-based alloy powder in a hydrogen atmosphere to separate a rare earth element and an iron-containing material from each other and producing a hydrogen compound of the rare earth element. The powder molded article (4) is produced by press-molding the powder, and a rare earth-iron-based alloy material (5) is produced by heating the powder molded material (4) under a reduced pressure. A rare earth-iron-nitrogen-based alloy material (6) is produced by heating the rare earth-iron-based alloy material (5) in a nitrogen atmosphere. |
