Patent Number: 6,254,659

Title: Rare earth - iron -boron permanent magnet and method for the manufacture thereof

Abstract: A permanent magnet has a base composition of SE--Fe--B, wherein SE is at least one rare earth element, including Y, and having the tetragonal phase SE.sub.2 Fe.sub.14 B as the principal phase, and additionally having an iron-free and boron-free phase of the general formula SE.sub.5 (Co, Ga), as a binder alloy. In a method for making such a permanent magnet, a powder of a base ally having the tetragonal phase composition, and a binder alloy having the aforementioned general formula composition, are mixed in a weight ration between 99:1 and 90:10.

Inventors: Schrey; Peter (Seeheim-Jugenheim, DE), Velicescu; Mircea (Waldshut, DE)

Assignee: Vacuumschmeleze GmbH

International Classification: H01F 1/057 (20060101); H01F 1/032 (20060101); C22C 029/14 ()

Expiration Date: 07/03/2018