Method of making rare-earth element containing permanent...

Details Method of making rare-earth element containing permanent... Method of making rare-earth element containing permanent...

H - Electricity

01

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75/148, 148/5

H01F 1/053 (2006.01) B22F 9/08 (2006.01) C22C 33/02 (2006.01) C22C 38/00 (2006.01) H01F 41/02 (2006.01)

Patent

CA 1276486

ABSTRACT OF THE DISCLOSURE A method for making rare earth-permanent magnets wherein a molten mass of a rare earth magnet alloy is produced such as by induction melting and while in a protective atmosphere is introduced in the form of a stream into a chamber having a protective atmosphere and a bottom portion containing a cooling medium, such as a cryogenic liquid which may be liquid argon. After cooling and solidification, the alloy is collected from the chamber and comminuted to produce particles. The particles are formed into a magnet body. Alternately, the stream may be atomized, as by striking the same with a jet of inert gas, to produce discrete droplets, which droplets are directed to the cooling medium at the chamber bottom for cooling, solidification and collection. *******

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