Rare earth permanent magnet and method for producing the same

Details Rare earth permanent magnet and method for producing the same Rare earth permanent magnet and method for producing the same

1997-05-21

1999-12-07

Sheehan, John

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

148103, 148104, B22F 700

Patent

active

05997804&

ABSTRACT:
A rare earth permanent magnet consisting essentially, by weight, of 27.0-31.0% of at least one rare earth element including Y, 0.5-2.0% of B, 0.02-0.15% of N, 0.25% or less of O, 0.15% or less of C, at least one optional element selected from the group consisting of 0.1-2.0% of Nb, 0.02-2.0% of Al, 0.3-5.0% of Co, 0.01-0.5% of Ga and 0.01-1.0% of Cu, and a balance of Fe, and a production method thereof. The contents of rare earth element, oxygen, carbon and oxygen in the magnet are regulated within the specific ranges.

REFERENCES:
patent: 4960469 (1990-10-01), Tanigawa et al.
patent: 4990307 (1991-02-01), Camp
patent: 5162064 (1992-11-01), Kim et al.
patent: 5174362 (1992-12-01), Croat
patent: 5431747 (1995-07-01), Takebuchi et al.
patent: 5489343 (1996-02-01), Uchida et al.

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