Additive manufacture of anisotropic rare earth magnets
US11232903B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Sep 24, 2018 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Sep 8, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method includes depositing a layer of alloy particles including rare earth permanent magnet phase above a substrate, laser scanning the layer while cooling the substrate to melt the particles, selectively initiate crystal nucleation, and promote columnar grain growth in a same direction as an easy axis of the rare earth permanent magnet phase. The method also includes repeating the depositing and scanning to form bulk anisotropic rare earth alloy magnet with aligned columnar grains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.