Patent ID: 6818041
Filing Date: 2004-11-16
Classification: H01F

Abstract:
Magnetic alloy powder for a permanent magnet containing:R of about 20 mass percent to about 40 mass percent (R is Y or at least type of rare earth element); T of about 60 mass percent to about 79 mass percent (T is a transition metal including Fe as a primary component); and Q of about 0.5 mass percent to about 2.0 mass percent (Q is an element including B (boron) and C (carbon)), wherein the magnetic alloy powder is formed by an atomize method, the shape of particles of the powder being substantially spherical, the magnetic alloy powder includes a first compound phase having Nd2Fe14B tetragonal structure as a primary composition phase and a second compound phase having a diffraction peak in a position in which lattice spacing d is about 0.295 nm to about 0.300 nm, and a ratio of a content of C to a total content of B and C is about 0.05 to about 0.90.