Fabrication of hollow, cored, and composite shaped parts from selected alloy powders
US4657822A · kind A · utility
15Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1986 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Jul 2, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Alloy powder is packed into a mold which comprises a complex-shaped solid aphite inner core and a similarly complex-shaped thin glass outer wall. The mold is evacuated, sealed, and then heated to the alloy sintering temperature, the glass softens and applies an isostatic pressure on the alloy as the alloy particles consolidate. After the consolidation step, the mold and its contents are cooled and the glass and graphite materials are removed from the alloy object. This method is particularly useful for preparing complex fittings of Nitinol shape memory alloys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.