Prereacted inhibitor powder for carbon-carbon composites
US4937101A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Nov 7, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B41/87
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The disclosure relates to a method of forming carbon-carbon composites wherein prereaction of the filler ingredients takes place prior to the prepregging operation, thereby ensuring that the sealant phase is both homogeneous and unsegregated on a microscopic scale. Composites prepared from several constituent inhibitor powders often have one inhibitor component segregated within the carbon fabric and fiber bundles during compaction, debulking and press curing. Composites prepared from prereacted powders have inhibitor constituents mixed on an atomic scale. Thus, the oxide sealant which forms from the prereacted particulate filler has an optimized composition with all of the desirable qualities, such as level viscosity, good wetting, low water solubility, low reactivity with the carbon fibers and carbon matrix during graphitization and low reactivity with the chemically vapor deposited coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.