Ceramic composite bodies with increased metal content
US5500182A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1993 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Jan 11, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/1057
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates generally to a novel method for forming a self-supporting body. Specifically, the formed self-supporting body has a higher volume percent of metallic constituent relative to a body formed by similar techniques. A first porous self-supporting body is formed by reactively infiltrating a molten parent metal into a bed or mass containing a boron donor material and a carbon donor material (e.g., boron carbide) and/or a boron donor material and a nitrogen material (e.g., boron nitride) and, optionally, one or more inert fillers. Additionally, powdered parent metal may be admixed with a mass to be reactively infiltrated to form additional porosity therein. The porous self-supporting body which is formed by the reactive infiltration process according to this invention should contain at least some interconnected porosity which is capable of being filled in a subsequent step with additional metal, thus increasing the volume percent of parent metal in the body at the expense of porosity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.