Method of molding metal particles
US5328657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1992 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Feb 26, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present method relates to molding metal particles by forming a flowable mixture. The metal particles are mixed with a polyorganic acid which chemically reacts with the metal particles. The flowable mixture is transferred to a mold before the chemical reaction between the metal particles and the polyorganic acid proceeds so far as to substantially increase the viscosity of the flowable mixture. A green preform is created by applying pressure to the mixture in a mold. The green preform is heated to a first temperature to vaporize substantially all of the non-organic components of the reacted polyorganic acid from the preform. The preform is then heated to a second temperature greater than the first temperature to sinter the metal particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.