Net shape processing of permanent magnet by field assisted sintering
US12334255B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2022 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | May 4, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Magnets having various portions of different densities and resistivities are disclosed. In a refinement, the various portions may have the same composition but different physical structures. Unique dies may be used to during processing, such as during sintering to manufacture the magnets. The die may include conductive and non-conductive surfaces that contact the green magnetic powder mixture during sintering such that the electrical current applied to the magnetic powder mixture is managed by the conductive and non-conductive surfaces to provide unique and complex magnets. Methods of manufacturing the magnets with the dies such as field assisted sintering, i.e., spark plasma sintering, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.