Iron nitride permanent magnet and technique for forming iron nitride permanent magnet
US11742117B2 · kind B2 · utility
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12References
21Claims
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Key dates
| Filing date | Jun 8, 2018 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Nov 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/0273
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet may include a Fe16N2 phase constitution. In some examples, the permanent magnet may be formed by a technique that includes straining an iron wire or sheet comprising at least one iron crystal in a direction substantially parallel to a <001> crystal axis of the iron crystal; nitridizing the iron wire or sheet to form a nitridized iron wire or sheet; annealing the nitridized iron wire or sheet to form a Fe16N2 phase constitution in at least a portion of the nitridized iron wire or sheet; and pressing the nitridized iron wires and sheets to form bulk permanent magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.