Oxidation-resistant interfacial coating for fiber-reinforced ceramic
US6322889A · kind A · utility
38Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Apr 22, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2958
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A ceramic-matrix composite having a multilayered interfacial coating adapted to protect the reinforcing fibers from long-term oxidation, while allowing these to bridge the wake of advancing cracks in the matrix, is provided by selectively mismatching materials within adjacent layers of the interfacial coating, the materials having different coefficients of thermal expansion so that a low toughness interface region is created to promote crack deflection either within an interior layer of the mismatched interfacial coating or between adjacent layers of the mismatched interfacial coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.