Method for the production of magnet cores, magnet core and inductive component with a magnet core
US8287664B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2007 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | May 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/255
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A magnet core is required to be particularly dense, made of alloys produced in a rapid solidification process and have a minimal coercitive field strength. To achieve these aims, a coarse-grain powder fraction is first produced from an amorphous strip of a soft magnetic alloy. In addition, at least one fine-grain powder fraction is produced from a nanocrystalline strip of a soft magnetic alloy. The particle fractions are then mixed to produce a multi-modal powder, wherein the particles of the coarse-grain particle fraction have an amorphous structure and the particles of the fine-grain powder fraction have a nanocrystalline structure. The multi-modal powder is then pressed to produce a magnet core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.