Magnet Recycling
OwnerMiha Zakotnik, Peter Afiuny +2inventors
InventorsMiha Zakotnik, Peter Afiuny, Scott Dunn, Catalina Oana Tudor
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Abstract
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for recycling magnetic material to restore or improve the magnetic performance One of the methods includes fragmenting magnetic material to form a powder, mixing the powder with a) a rare earth material R and b) an elemental additive A to produce a homogeneous powder, wherein the rare earth material comprises at least one of: i) Nd, ii) Pr, and iii) Dy, and the elemental additive A comprises at least one of: i) Co, ii) Cu, and iii) Fe, and sintering and magnetizing the homogenous powder to form a Nd—Fe—B magnetic product.
Claims34
A method for manufacturing an Nd—Fe—B permanent magnet comprising:
- fragmenting magnetic material to form a powder;
- removing particles with a particle fraction size bigger than an average size of particles in the magnetic material from the magnetic material to obtain 1.98 at. % oxygen or less in the magnetic material;
- mixing the powder with a) a rare earth material R and b) an elemental additive A to produce a homogeneous powder, wherein the rare earth material R comprises at least one of:
- i) Nd, ii) Pr, and iii) Dy, and the elemental additive A comprises at least one of:
- i) Co, ii) Cu, and iii) Fe;
- and
- sintering and magnetizing the homogenous powder to form a Nd—Fe—B magnetic product.
Dependencies are inferred from the claim text.