Platinum-cobalt alloy permanent magnets of enhanced coercivity

Details Platinum-cobalt alloy permanent magnets of enhanced coercivity Platinum-cobalt alloy permanent magnets of enhanced coercivity

H - Electricity

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H01F 1/047 (2006.01) C22C 5/04 (2006.01) H01F 1/04 (2006.01)

Patent

CA 2033067

-13- ABSTRACT The coercivity of magnetic alloys formed from platinum, cobalt, and boron is enhanced by in- corporating from 12 to 14 percent of boron together with amounts of platinum and cobalt such that the ratio of platinum to cobalt is from 0.90. to 1.2. The magnetic alloy is formed by rapid solidification of a homogeneous melt, and the solidified casting is heat treated to improve microstructure and increase coercivity.

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