Oxidation-inhibited carbon-carbon composites
US4795677A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Aug 3, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2557
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Carbon-carbon composites consisting of graphite fibers reinforcing a carbon matrix are protected from oxidation by a B.sub.2 O.sub.3 glass coating which includes a refractory oxide to stabilize the viscosity of the glass. Precursors of B.sub.2 O.sub.3 and the refractory oxide are dispersed into a resin, the resin is used to impregnate fibrous graphite or fibrous graphitizable material, the sheets are laid up as plies and the laid-up plies are carbonized and graphitized using heat structure. The composite structure is then coated with an additional mix of resin and precursors and the coated structure is heated to carbonize the resin and leave a seal coat on the structure. Then an outer shell of a refractory material is deposited on the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.