Compressible coating reinforcements for ceramic matrix composites, and methods of making the same
US11787746B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2021 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Nov 5, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/77
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Some variations provide a pre-ceramic matrix composite comprising: a precursor pre-ceramic matrix; reinforcing elements disposed within the precursor pre-ceramic matrix; and a compressible material disposed on the surface of the reinforcing elements and interposed between the reinforcing elements and the precursor pre-ceramic matrix. Other variations provide a ceramic matrix composite comprising: a ceramic matrix; reinforcing elements disposed within the ceramic matrix; and a compressed material disposed on the surface of the reinforcing elements and interposed between the reinforcing elements and the matrix. The coating of compressible material prevents cracking during processing because the coating absorbs stresses associated with volumetric shrinkage of the ceramic matrix during densification, thereby reducing the stresses at the interface between the reinforcing elements and the ceramic matrix. Methods of fabricating ceramic matrix composites using the principles of the invention are disclosed. Methods include pyrolysis of pre-ceramic polymers, sintering of pre-ceramic materials, and sol-gel processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.