Method of fabrication of mixed rare-earth permanent magnet

Abstract

A method of producing a permanent magnet includes: melting boron, cobalt, a metallic alloy component, a mixed rare earth material, and iron together to form a melted alloy and forming a first alloy ingot using the melted alloy, wherein the permanent magnet comprises about 28-35 weight percent of rare earth material; crushing the first alloy ingot into particles having a first average particle diameter less than about 3 millimeters; milling the particles to form a powder mixture with a second average particle diameter in the range from about 2.5-5 microns; shaping the powder mixture, in a magnetic field, into a powder compact; sintering the powder compact at a temperature ranging from about 1020-1120 degrees centigrade for a time duration ranging from about 1-5 hours to form a second ingot; and aging the second ingot at a temperature ranging from about 450-650 degrees centigrade for time duration ranging from about 1-5 hours

Dependencies are inferred from the claim text.