Process for fabricating parts from particulate material
US4765950A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Oct 7, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a method of manufacturing sintered parts from particulate material, e.g metal or ceramic parts. The method comprises mixing together predetermined amounts of powdered particulate material and a binder, which mixture is then molded under heat and pressure. The binder comprises at least a lower melting point component and a higher melting point component, with the lower melting point component remaining in a liquid state, becoming semi-solid or relatively soft upon cooling to ambient temperatures. Prior to sintering, the lower melting point component of the binder is selectively dissolved in a liquid solvent, and the higher melting point component is removed upon heating at temperatures below the sintering temperature. The result is a process which eliminates or prevents the formation of oxides, substantially reduces the time required for debinding and sintering, and essentially eliminates cracking in the finished part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.