Forming complex-shaped aluminum components
US6761852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Although MIM (metal injection molding) has received widespread application, aluminum has not been widely used for MIM in the prior art because of the tough oxide layer that grows on aluminum particles, thus preventing metal—metal bonding between the particles. The present invention solves this problem by adding a small amount of material that forms a eutectic mixture with aluminum oxide, and therefore aids sintering, to reduce the oxide, thereby allowing intimate contact between aluminum surfaces. The process includes the ability to mold and then sinter the feedstock into the form of compacted items of intricate shapes, small sizes (if needed), and densities of about 95% of bulk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.