초록 ▼

Permanent magnets, devices including permanent magnets and methods for manufacture are described with the permanent magnet comprising, for example: iron-boron-rare earth alloy particulate having an intrinsic coercive force of at least about 1591 kiloamperes/meter (about 20 kiloOersteds) and a residu

Permanent magnets, devices including permanent magnets and methods for manufacture are described with the permanent magnet comprising, for example: iron-boron-rare earth alloy particulate having an intrinsic coercive force of at least about 1591 kiloamperes/meter (about 20 kiloOersteds) and a residual magnetization of at least about 0.8 tesla (about 8 kiloGauss), wherein the rare earth content comprises praseodymium, a light rare earth element selected from the group consisting of cerium, lanthanum, yttrium and mixtures thereof, and balance neodymium; and a binder bonding the particulate.

대표청구항 ▼

1. A method of fabricating a permanent magnet, comprising: sintering to form an iron-boron-rare earth alloy; fracturing the sintered iron-boron-rare earth alloy into particulates having a rare earth content comprising (1) praseodymium, (2) cerium, lanthanum or yttrium and (3) neodymium; and the

1. A method of fabricating a permanent magnet, comprising: sintering to form an iron-boron-rare earth alloy; fracturing the sintered iron-boron-rare earth alloy into particulates having a rare earth content comprising (1) praseodymium, (2) cerium, lanthanum or yttrium and (3) neodymium; and the binding the particulates with a binder to provide a moldable material; and molding moldable material into a permanent magnet. 2. The method of claim 1, comprising sintering, melt solidifying the iron-boron-rare earth alloy and fracturing the alloy into the particulates. 3. The method of claim 1, comprising sintering, melt spinning the iron-boron-rare earth alloy and fracturing the alloy into the particulates. 4. The method of claim 1, comprising melt solidifying the sintered alloy and fracturing the solidified and sintered alloy into the particulates. 5. The method of claim 1 further comprising heating and then magnetizing the particulates.