Patent ID: 7507302
Filing Date: 2009-03-24
Classification: B22F,B82Y,C22C,H01F,H01L

Abstract:
1. A nanocomposite magnet powder of an iron-based rare-earth alloy having a composition represented by the general formula: (Fe 10 at %<x≦25 at %; 6 at %≦y<10 at %; 0.1 at %≦z≦12 at %; 0≦m≦0.5; and 0 at %≦n≦10 at %, respectively, wherein the nanocomposite magnet powder is obtained by an atomization process and includes at least two types of ferromagnetic crystalline phases, in which an R a ferromagnetic iron-based boride phase and an α-Fe phase serving as the soft magnetic phase are present on a grain boundary or sub-boundary of the R the average crystal grain size of the ferromagnetic iron-based boride phase and α-Fe is smaller than that of the R