US5204299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified ceramic structures
Assignee: Lanxide Technology Co LP
•
Filing: 1991-11-04
•
Granted: 1993-04-20
•
Expires: 2011-11-04
Abstract
Abstract A method of producing self-supporting ceramic a ceramic composite structures comprising (i) a polycrystalline oxidation reaction product formed upon oxidation of a body of molten parent metal with an oxidant, and (ii) interconnected porosity at least partially accessible from one or more surfaces of the ceramic body. A second polycrystalline ceramic or ceramic composite material is incorporated into the porosity of the ceramic or ceramic composite body to modify or contribute to its properties.
Inventors
- 👤 Ratnesh K. Dwivedi
- 👤 Christopher R. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:18
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B35/00; C04B35/622; C04B35/64; C04B35/65; C04B35/652; C04B41/45; C04B41/50; C04B41/5025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
A shaped self-supporting ceramic matrix composite body comprising a ceramic matrix incorporating at least one preform, said preform comprising a shaped body of filler material which is capable of supporting its own weight and maintaining dimensional fidelity and interconnected porosity without any means of support located external to any surface of said preform, said ceramic matrix being disposed within at least a portion of said interconnected porosity so as to embed the filler material and said ceramic matrix consisting essentially of about 60-99 percent by weight of an essentially single phase polycrystalline oxidation reaction product consisting essentially of a material selected from the group consisting of alumina, aluminum nitride and silicon nitride, and the remainder of said ceramic matrix consisting essentially of at least one metallic constituent and interconnected porosity, wherein a second ceramic component selected from the group consisting of chromia and silica is disposed in at least a portion of said porosity, said self-supporting ceramic matrix composite body corresponding substantially in shape to the configuration of said at least one preform.
Claim 2
Dependent Claim
173 words
A shaped self-supporting ceramic matrix composite body comprising a ceramic matrix incorporating at least one preform, said preform comprising a shaped body of filler material which is capable of supporting its own weight and maintaining dimensional fidelity and interconnected porosity without any means of support located external to any surface of said preform, said ceramic matrix being disposed within at least a portion of said interconnected porosity so as to embed the filler material and said ceramic matrix consisting essentially of about 60-99 percent by weight of an essentially single phase polycrystalline oxidation reaction product consisting essentially of a material selected from the group consisting of alumina, aluminum nitride and silicon nitride, and the remainder of said ceramic matrix consisting essentially of at least one metallic constituent and interconnected porosity, wherein a second ceramic component selected from the group consisting of chromia and silica is disposed in at least a portion of said porosity, said self-supporting ceramic matrix composite body corresponding substantially in shape to the configuration of said at least one preform.
Claim 3
Dependent Claim
99 words
A self-supporting ceramic matrix composite body comprising a ceramic matrix incorporating at least one filler material, said ceramic matrix embedding said filler material and said ceramic matrix consisting essentially of about 60-99 percent by weight of polycrystalline oxidation reaction product consisting essentially of a material selected from the group consisting of alumina, aluminum nitride and silicon nitride, and the remainder of said ceramic matrix consisting essentially of at least one metallic constituent and interconnected porosity, wherein a second ceramic component selected from the group consisting of chromia and silica is disposed in at least a portion of said porosity.
Claim 4
Dependent Claim
99 words
A self-supporting ceramic matrix composite body comprising a ceramic matrix incorporating at least one filler material, said ceramic matrix embedding said filler material and said ceramic matrix consisting essentially of about 60-99 percent by weight of polycrystalline oxidation reaction product consisting essentially of a material selected from the group consisting of alumina, aluminum nitride and silicon nitride, and the remainder of said ceramic matrix consisting essentially of at least one metallic constituent and interconnected porosity, wherein a second ceramic component selected from the group consisting of chromia and silica is disposed in at least a portion of said porosity.
References Cited (Backward Citations)
US2741822A
Cited
US3255027A
Cited
US3298842A
Cited
US3296002A
Cited
US3419404A
Cited
US3473987A
Cited
US3421863A
Cited
US3437468A
Cited
US3789096A
Cited
US3473938A
Cited
US3864154A
Cited
US3973977A
Cited
EP0116809A1
Cited
EP0155831A2
Cited
EP0169067A2
Cited
US5063185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |