US5026604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material with refractory fibrous reinforcement and ceramic matrix
Assignee: Safran Aircraft Engines SAS
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Filing: 1988-04-06
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Granted: 1991-06-25
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Expires: 2008-04-06
Abstract
Abstract A composite structure having a fibrous reinforcing body formed from fibers of a refractory material, a ceramic matrix surrounding the fibers of the reinforcing body and an intermediate layer of a refractory material having a laminar structure disposed between the fibers of the refractory material having a laminar structure disposed between the fibers of the refractory material and the ceramic matrix and adherent to both. The intermediate layer has a thickness sufficient to reduce the susceptibility of the structure to crack propagation and to increase impact strength but not exceeding 3.0 microns. The intermediate layer is also elastically deformable in shear and has an elongation at break greater than the matrix.
Inventors
- 👤 Jacques Thebault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:11
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/515; C04B35/56; C04B35/565; C04B35/571; C04B35/622; C04B35/624; C04B35/626; C04B35/628; C04B35/62844; C04B35/62857; C04B35/6286; C04B35/62863; C04B35/62865; C04B35/62868; C04B35/62884; C04B35/62897; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/44; C04B2235/441; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5244; C04B2235/5248; C04B2235/60; C04B2235/614; C04B2235/616; C04B2235/70; C04B2235/95; C04B2235/96; C04B2235/9669; C04B2235/9684; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2956
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A composite structure comprising (a) a fibrous reinforcing body formed from fibers of a refractory material; (b) a ceramic matrix surrounding the fibers of the reinforcing body; and (c) an intermediate layer of a refractory material having a laminar structure disposed between the fibers of the refractory material and the ceramic matrix and adherent to both, wherein said intermediate layer has a thickness sufficient to reduce the susceptibility of the structure to crack propagation and to increase impact strength not exceeding 3.0 microns is elastically deformable in shear and has an elongation at break greater than the matrix.
Claim 2
Dependent Claim
98 words
A composite structure comprising (a) a fibrous reinforcing body formed from fibers of a refractory material; (b) a ceramic matrix surrounding the fibers of the reinforcing body; and (c) an intermediate layer of a refractory material having a laminar structure disposed between the fibers of the refractory material and the ceramic matrix and adherent to both, wherein said intermediate layer has a thickness sufficient to reduce the susceptibility of the structure to crack propagation and to increase impact strength not exceeding 3.0 microns is elastically deformable in shear and has an elongation at break greater than the matrix.
Claim 3
Dependent Claim
19 words
A structure according to claim 1, wherein the intermediate layer has a thickness of from 0.2 to 3 microns.
Claim 4
Dependent Claim
16 words
A structure according to claim 1, wherein the intermediate layer consists essentially of laminar pyrolytic carbon.
Claim 5
Dependent Claim
15 words
A structure according to claim 1, wherein the intermediate layer consists essentially of boron nitride.
Claim 6
Dependent Claim
15 words
A structure according to claim 1, wherein the reinforcing body is formed from carbon fibers.
Claim 7
Dependent Claim
16 words
A structure according to claim 1, wherein the reinforcing body is formed from silicon carbide fibers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |