Method for forming a nitrogenation barrier and machine formed using a body having the nitrogenation barrier
US10673288B2 · kind B2 · utility
6Cited by
23References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2018 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | May 26, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2003/106
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method includes forming one or more oxide barrier layers on one or more protected portions of a magnetic, metallic body, and converting one or more unprotected portions of the magnetic, metallic body to a less magnetic material by exposing the magnetic metallic body having the one or more oxide barrier layers formed thereon to nitrogen. One or more protected portions of the magnetic, metallic body that are beneath the one or more oxide barrier layers are not converted to the less magnetic material. The method can be used to form one or more layers of a laminated electric motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.