Powder for magnetic member, powder compact, and magnetic member

摘要

The present invention provides a powder for a magnetic member being excellent in moldability and difficult to oxidize, a powder compact produced from the powder, and a magnetic member suitable for a raw material of a magnetic member such as a rare earth magnet. A powder for a magnetic member includes magnetic particles 1 which constitute the powder for a magnetic member and each of which is composed of less than 40% by volume of a hydrogen compound 3 of a rare earth element, and the balance composed of an iron-containing material 2 which contains iron and an iron-boron alloy containing iron and boron. The hydrogen compound 3 of a rare earth element is dispersed in a phase of the iron-containing material 2. An antioxidant layer 4 having a low-oxygen permeability coefficient is provided on the surface of each of the magnetic particles 1.

主权项

1. A powder for a magnetic member used for a raw material, the powder comprising:
magnetic particles which constitute the powder for a magnetic member, wherein: each of the magnetic particles is composed of less than 40% by volume of a hydrogen compound of a rare earth element, and the balance composed of an iron-containing material, the iron-containing material contains iron and an iron-boron alloy containing iron and boron, the hydrogen compound of a rare earth element is dispersed in a phase of the iron-containing material, an antioxidant layer having an oxygen permeability coefficient (30° C.) of less than 1.0×10−11 m3·m/(s·m2·Pa) is provided on the periphery of each of the magnetic particles, the antioxidant layer is composed of a resin, the rare earth element is at least one selected from the group consisting of Nd, Pr, Ce, and Y, a heat-resistant precursor layer is provided on the surface of each of the magnetic particles, and the heat-resistant precursor layer includes a rare earth source material composed of at least one of a compound and an alloy which contains at least one rare earth element of Dy and Tb and does not contain oxygen, and the antioxidant layer which covers at least a portion of the rare earth source material.