Patent ID: 9196403
Filing Date: 2015-11-24
Classification: B22F,C22C,H01F

Abstract:
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 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.