Praseodymium-rich iron-boron-rare earth composition, permanent m

Details Praseodymium-rich iron-boron-rare earth composition, permanent m Praseodymium-rich iron-boron-rare earth composition, permanent m

1999-02-12

2000-09-19

Mai, Ngoclan

Metal treatment

Stock

Magnetic

75244, 75245, 148101, 148103, 419 23, 419 38, H01F 1053

Patent

active

061206202

ABSTRACT:
A permanent magnet having substantially stable magnetic properties is disclosed having as the active magnetic component a sintered product of compacted particulate iron-boron-rare earth intermetallic material, said sintered product having pores which are substantially non-interconnecting, a density of at least 87 percent of theoretical and a composition consisting essentially of in atomic percent about 13 to about 19 percent rare earth elements, about 4 to about 20 percent boron and about 61 to about 83 percent of iron with or without impurities; where the rare earth content is greater than 50 percent praseodymium with an effective amount of a light rare earth selected from the group consisting of cerium, lanthanum, yttrium and mixtures thereof, and balance neodymium.

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