US5296311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide reinforced reaction bonded silicon carbide composite
Assignee: Unifrax I LLC
•
Filing: 1992-03-17
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Granted: 1994-03-22
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Expires: 2012-03-17
Abstract
Abstract The invention provides silicon carbide fiber-reinforced, reaction-bonded silicon carbide composites suitable for high temperature applications in which the silicon carbide fiber is coated with AlN, BN or TiB 2 . The composites offer superior fracture toughness which is ascribed to fiber pullout. The invention also includes a process for making the composites.
Inventors
- 👤 Carl H. McMurtry
- 👤 Sa-Kwing Lau
- 👤 Gajawalli V. Srinivasan
- 👤 Stephen Chwastiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:35
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/628; C04B35/62844; C04B35/62857; C04B35/62865; C04B35/515; C04B35/56; C04B35/565; C04B35/573; C04B35/624; C04B35/62605; C04B35/62625; C04B35/6263; C04B35/62868; C04B35/62884; C04B35/62897; C04B35/63; C04B35/6303; C04B35/6316; C04B35/71; C04B35/78; C04B35/80; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/34; C04B2235/3427; C04B2235/38; C04B2235/3817; C04B2235/3826; C04B2235/46; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5244; C04B2235/60; C04B2235/616; C04B2235/70; C04B2235/96; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2956; Y10T428/2958
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A silicon carbide fiber reinforced silicon carbide composite which is thermally stable to 1420° C. comprising: a reaction bonded silicon carbide matrix; a silicon carbide fiber reinforcement and an aluminum nitride interface coating about 0.1 to about 15 microns thick on said fibers said coating having chemical and mechanical compatibility with said silicon carbide matrix and said silicon carbide fibers; wherein said silicon carbide fibers pull-out from said silicon carbide matrix upon fracture.
Claim 2
Dependent Claim
73 words
A silicon carbide fiber reinforced silicon carbide composite which is thermally stable to 1420° C. comprising: a reaction bonded silicon carbide matrix; a silicon carbide fiber reinforcement and an aluminum nitride interface coating about 0.1 to about 15 microns thick on said fibers said coating having chemical and mechanical compatibility with said silicon carbide matrix and said silicon carbide fibers; wherein said silicon carbide fibers pull-out from said silicon carbide matrix upon fracture.
Claim 3
Dependent Claim
22 words
A silicon carbide fiber reinforced silicon carbide composite of claim 1 containing up to about 44 volume percent coated silicon carbide fibers.
Claim 4
Dependent Claim
17 words
A silicon carbide fiber reinforced silicon carbide composite of claim 2 containing about 40 volume percent fiber.
References Cited (Backward Citations)
US2938807A
Cited
US3205043A
Cited
US3305372A
Cited
US3492153A
Cited
US3617437A
Cited
US3765300A
Cited
US3627519A
Cited
US3649310A
Cited
US4097293A
Cited
US3736159A
Cited
US4332755A
Cited
US4539298A
Cited
US4507224A
Cited
US4632794A
Cited
USRE32843E
Cited
US4562040A
Cited
US4735756A
Cited
US4642271A
Cited
US4944904A
Cited
US4929472A
Cited
US4820663A
Cited
US4876941A
Cited
US4800064A
Cited
US4931242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |