PRASEODYMIUM-RICH IRON-BORON-RARE EARTH COMPOSITION, PERMANENT MAGNET PRODUCED THEREFROM, AND METHOD OF MAKING

Title:

PRASEODYMIUM-RICH IRON-BORON-RARE EARTH COMPOSITION, PERMANENT MAGNET PRODUCED THEREFROM, AND METHOD OF MAKING

Document Type and Number:

WIPO Patent Application WO2000048209

Kind Code:

A9

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 consists of 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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Inventors:

BENZ MARK GILBERT
SHEI JULIANA CHING

Application Number:

PCT/US2000/002946

Publication Date:

August 09, 2001

Filing Date:

February 03, 2000

Export Citation:

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Assignee:

GEN ELECTRIC (US)

International Classes:

B22F3/00; B22F1/00; B22F3/02; B22F3/24; C22C33/02; C22C38/00; H01F1/057; H01F1/08; (IPC1-7): H01F1/057

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