Forming curved wafer thin magnets from rare earth- cobalt...

Details Forming curved wafer thin magnets from rare earth- cobalt... Forming curved wafer thin magnets from rare earth- cobalt...

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H02K 1/12 (2006.01) H01F 1/055 (2006.01) H01F 41/02 (2006.01) H01F 41/14 (2006.01) H02K 15/02 (2006.01) H02K 15/03 (2006.01)

Patent

CA 1085902

FORMING CURVED WAFER THIN MAGNETS FROM RARE EARTH-COBALT ALLOY POWDERS Abstract of the Disclosure: In a preferred embodiment thin curved rare earth- cobalt magnets supported on the interior surface of a steel casing are formed by hot isostatic compaction. Rare earth- cobalt powder is magnetically aligned and compacted to at least 65% of the theoretical density. The relatively strong, curved green compacts are positioned on a curved mandrel and placed in a closely fitting steel casing which is evacuated and sealed. The magnets are densified under isostatic gas pressure at elevated temperatures and bonded to the steel. The steel backing serves as an integral motor casing when such magnets are used in D.C. motors.

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