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US 11,715,592 B2Granted
Samarium cobalt and neodymium iron boride magnets and methods of manufacturing same
AssigneeLawrence Livermore National Security, LLC
InventorsSarah Baker, Joshua Kuntz, Scott K. Mccall, Christine A. Orme, Alexander A. Baker, Jonathan R. I. Lee
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Abstract
In one embodiment, a magnet includes a three-dimensional structure with nanoscale features, where the three-dimensional structure has a near net shape corresponding to a predefined shape.
Claims22
A method of making a permanent magnet, the method comprising:
- forming a three dimensional structure having a predefined geometry, wherein the three dimensional structure comprises oxidized precursor metal particles;
- heating the formed three dimensional structure in an atmosphere comprising a calcium vapor and a gas for reducing the oxidized precursor metal particles of the-formed three dimensional structure;
- and
- applying a magnetic field to the reduced precursor metal particles, wherein the formed three dimensional structure is transformed to a magnet having the predefined geometry.
1 more element
A method of making a thin foil magnet, the method comprising:
- forming a thin foil having a plurality of layers of oxidized precursor metal nanoparticles, the forming of the thin foil comprises:
- forming a first layer of oxidized precursor metal nanoparticles on a substrate, wherein the oxidized precursor metal nanoparticles are suspended in a solution;
- evaporating a liquid component of the solution from the first layer of oxidized precursor metal nanoparticles;
- after the evaporating, forming at least one second layer of oxidized precursor metal nanoparticles above the first layer of oxidized precursor metal nanoparticles;
- and
- evaporating the liquid component of the solution from the at least one second layer of oxidized precursor metal nanoparticles,
- wherein the thin foil has a plurality of layers of oxidized precursor metal nanoparticles, wherein the thin foil has a pre-defined thickness;
- reducing the oxidized precursor metal nanoparticles of the thin foil in an atmosphere comprising a calcium vapor and a gas;
- and
- applying a magnetic field to the reduced precursor metal nanoparticles of the thin foil.
7 more elements
Dependencies are inferred from the claim text.