Rare earth magnet and production process thereof

Details Rare earth magnet and production process thereof Rare earth magnet and production process thereof

2011-08-23

2011-08-23

Sheehan, John (Department: 1736)

Metal treatment

Stock

Magnetic

C148S101000

Reexamination Certificate

active

08002906

ABSTRACT:
The present invention provides a rare earth magnet, which is formed through at least hot molding, the rare earth magnet containing grains including an R2X14B phase as a main phase, and a grain boundary phase surrounding peripheries of the grains, in which R is at least one element selected from the group consisting of Nd, Pr, Dy, Tb and Ho, and X is Fe or Fe with a part being substituted by Co; in which an element RH is more concentrated in the grain boundary phase than in the grains, in which the element RH is at least one element selected from the group consisting of Dy, Tb and Ho; and the element RH is present with a substantially constant concentration distribution from the surface part of the magnet to the central part of the magnet.

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