Method of fabricating a mold-cast porous metal structure
US6516862B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Mar 30, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D27/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of fabricating a porous metal structure of a molten liquid metal within a casting chamber to form a porous solid structure upon controlled chamber cooling and depressurization. The method includes provision of a pressurizable stationary mold casting chamber having a gas pressure release valve, a gas pressure measurement sensor, and a plurality of sites with respective surface-temperature or heat flux sensors and respective independently operable temperature controllers for regulating each respective site temperature. A data base driven microprocessor receives pressure and temperature data and selectively and independently adjusts pressure and temperature in accord with algorithmic commands relative required pressure reduction for pore formation and cooling for solidification to chosen extents of porosity and of solidification over a time period terminating upon porous solid-structure fabrication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.