Process for preparing hot-pressed sintered alloys
US4101348A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1975 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Dec 29, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/14791
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Aluminum-silicon-iron alloys exhibiting an excellent combination of properties are disclosed. The process for preparing these alloys is also disclosed. In this process an aluminum-silicon-iron alloy powder is formed, sintered and hot-pressed simultaneously with or after sintering. The alloy powder can contain 4-9%, by weight, aluminum, 8-11%, by weight, silicon and the remainder iron. Pressures for hot-pressing of at least 1000 psi. and sintering temperatures of at least 1205.degree. C are disclosed. The process can also include the additional step of nitriding the alloy powder prior to sintering. Such nitriding prevents or retards grain growth during sintering and provides increased electrical resistivity and hardness in the end product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.