Porous interfacial coating for fiber reinforced ceramic matrix composites
US6121169A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Feb 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2992
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is embodied in ceramic matrix composites with porous interfacial coatings and the methods and processes for fabricating such coatings integral with the ceramic matrix composites. Each ceramic matrix composite of the present invention includes a fibrous substrate or fabric material with a porous interfacial coating. The coating, prior to processing, is comprised of a coating solution made of a carbon precursor and a ceramic precursor resin dissolved directly within a solvent or solvents. Fabrication is achieved by first desizing the fibrous substrate, second immersing the desized fibrous substrate in the mixed coating solution, third evaporating the solvent and curing the precursor and resin via a low temperature cure, and fourth pyrolyzing the coating via a high temperature pyrolysis, preferably in an inert atmosphere. Next, the coated fibrous substrate is combined with a ceramic matrix composite (CMC). Last the coated fibrous substrate/CMC system is oxidized to remove the carbon particulates within the coating via high temperature air exposure to produce a CMC material with a porous interfacial coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.