Dust core, method of manufacturing said dust core, and inductance element and rotary electric machine including said dust core
US9449752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Nov 23, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It is an objective of the invention to provide a dust core made of an Fe-based amorphous metal powder having excellent magnetic properties, in which the dust core has a higher-than-conventional density, excellent magnetic properties and a high mechanical strength. There is provided a dust core including a mixture powder compacted, the mixture powder including: an Fe-based amorphous metal powder having a crystallization temperature Tx (unit: K), the Fe-based amorphous metal powder being plastically deformed, the plastically deformed metal Fe-based amorphous metal powder having a filling factor in the dust core higher than 80% and not higher than 99%; and a resin binder having a melting point Tm (unit: K), in which the Tx and Tm satisfy a relationship of “Tm/Tx≧0.70”.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.