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AssigneeMagnequench International, Inc.
InventorsViswanathan Panchanathan, William Ray Green, Kevin Allen Young
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Isotropic magnetic alloy powder having an intrinsic magnetic induction of at least two third of its magnetic remanence and method for making same are provided. The powder is made from an alloy having a composition comprising, by weight percentage, approximately 15 to 35 percent of one or more rare earth metals, approximately 0.5 to 4.5 percent of boron, and approximately 0 to 20 percent of cobalt, balanced with iron. The alloy powder is made by a process wherein an amount of the alloy is melt and spun in an inert environment, preferably at a distance between an orifice and a wheel being less than one and one half inches, into ribbons, followed by crushing the ribbons into powder and annealing the powder.
Isotropic magnetic material consisting of, by weight percentage, approximately 15 to 35 percent of one or more rare earth metals, approximately 0.5 to 4.5 percent of boron, approximately 0 to 20 percent of cobalt and balanced with iron, said material having an intrinsic magnetic induction, when measured at two third of its intrinsic coercivity and without taking into consideration of demagnetization correction factor, of at least two-thirds of its magnetic remanence.
Isotropic magnetic material made from an alloy having a composition consisting of, by weight percentage, approximately 15 to 35 percent of one or more rare earth metals, approximately 0.5 to 4.5 percent of boron, and approximately 0 to 20 percent of cobalt, balanced with iron, said material having an intrinsic magnetic induction, when measured at two-thirds of its intrinsic coercivity and without taking into consideration of demagnetization correction factor, of at least two-thirds of its magnetic remanence, said material having been made by a melt spinning process.
Isotropic magnetic material made from an alloy having a composition consisting of, by weight percentage, approximately 15 to 35 percent of one or more rare earth metals, approximately 0.5 to 4.5 percent of boron, and approximately 0 to 20 percent of cobalt, balanced with iron, said magnetic material having an intrinsic magnetic induction, when measured at two-thirds of its intrinsic coercivity and without taking into consideration of demagnetization correction factor, of at least two-thirds of its magnetic remanence, said magnetic material having been made by a melt spinning process wherein said alloy is melted and spun into ribbons, with a distance between an orifice and a wheel being less than one and one half inches, followed by a process of crushing said ribbons into powder and annealing said powder.
The isotropic magnetic material of claimed 11 wherein said ribbons are crushed into powder of less than 40 mesh size.
Dependencies are inferred from the claim text.