US5009823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding a carbon-carbon composite
Assignee: RTX Corp
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Filing: 1990-08-27
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Granted: 1991-04-23
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Expires: 2010-08-27
Abstract
Abstract A method of making a high strength carbon-carbon utilizing a solid flowable particulate polymer as a pressurizing medium. A resin impregnated carbon fiber reinforced prepreg is disposed in a pressure vessel and the vessel is substantially filled with a solid flowable particulate polymer. The prepreg is exposed to sufficient temperatures and pressures to cure the prepreg to form a carbon-carbon precursor which is subsequently exposed to temperature and pressures sufficient to post-cure the carbon-carbon precursor. The post-cured carbon-carbon precursor is exposed to temperatures and pressures sufficient to carbonize said post-cured carbon-carbon precursor to form a carbon-carbon composite.
Inventors
- 👤 Robert V. Kromrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:17
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29C43/10; B01; B01J; B01J3/00; B01J3/04; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/44; C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; B29C43/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A method for making a carbon-carbon composite comprising: (a) disposing a resin impregnated carbon fiber reinforced prepreg in a pressure vessel; (b) substantially filling said pressure vessel with a solid flowable particulate polymer; (c) exposing said prepreg to temperatures and pressures sufficient to cure said prepreg to form a carbon-carbon precursor; (d) exposing said carbon-carbon precursor to temperatures and pressures sufficient to post-cure said carbon-carbon precursor; and (e) exposing said post-cured carbon-carbon precursor to temperatures and pressures sufficient to carbonize said post-cured carbon-carbon precursor to form a carbon-carbon composite; wherein said curing, postcuring, and carbonization is a continuous process and said carbon-carbon composite has high strength.
Claim 2
Independent Claim
106 words
A method for making a carbon-carbon composite comprising: (a) disposing a resin impregnated carbon fiber reinforced prepreg in a pressure vessel; (b) substantially filling said pressure vessel with a solid flowable particulate polymer; (c) exposing said prepreg to temperatures and pressures sufficient to cure said prepreg to form a carbon-carbon precursor; (d) exposing said carbon-carbon precursor to temperatures and pressures sufficient to post-cure said carbon-carbon precursor; and (e) exposing said post-cured carbon-carbon precursor to temperatures and pressures sufficient to carbonize said post-cured carbon-carbon precursor to form a carbon-carbon composite; wherein said curing, postcuring, and carbonization is a continuous process and said carbon-carbon composite has high strength.
Claim 3
Dependent Claim
49 words
The method of making a carbon-carbon composite as recited in claim 1 wherein said solid flowable polymer comprises a particulate silicon polymer having a nominal flow rate of at least 0.6 gram per second through a 1.1 centimeter diameter pipe 7.6 centimeters long under applied pressure of 10.34 MPa.
Claim 4
Dependent Claim
28 words
The method of making a carbon-carbon composite as recited in claim 1 wherein said carbon-carbon composite is exposed to temperatures and pressures sufficient to graphitize said carbon-carbon composite.
Claim 5
Dependent Claim
19 words
The method of making a carbon-carbon composite as recited in claim 1 wherein said graphitized carbon-carbon composite is redensified.
Claim 6
Dependent Claim
34 words
The method of making a carbon-carbon composite as recited in claim 1 wherein said solid flowable particulate polymer is capable of producing a substantially uniform predetermined medium pressure on the surface of said prepreg.
Claim 7
Independent Claim
114 words
A method for making a carbon-carbon composite comprising: (a) disposing a resin impregnated carbon fiber reinforced prepreg in a pressure vessel; (b) substantially filling said pressure vessel with a solid flowable particulate polymer; (c) exposing said prepreg to temperatures and pressures sufficient to cure said prepreg to form a carbon-carbon precursor; (d) exposing said carbon-carbon precursor to temperatures and pressures sufficient to post-cure said carbon-carbon precursor; and (e) exposing said post-cured carbon-carbon precursor to temperatures of about 538° C. to about 816° C. and pressures sufficient to carbonize said post-cured carbon-carbon precursor to form a carbon-carbon composite; wherein said curing, postcuring and carbonization is a continuous process and said carbon-carbon composite has high strength.
Claim 8
Independent Claim
114 words
A method for making a carbon-carbon composite comprising: (a) disposing a resin impregnated carbon fiber reinforced prepreg in a pressure vessel; (b) substantially filling said pressure vessel with a solid flowable particulate polymer; (c) exposing said prepreg to temperatures and pressures sufficient to cure said prepreg to form a carbon-carbon precursor; (d) exposing said carbon-carbon precursor to temperatures and pressures sufficient to post-cure said carbon-carbon precursor; and (e) exposing said post-cured carbon-carbon precursor to temperatures of about 538° C. to about 816° C. and pressures sufficient to carbonize said post-cured carbon-carbon precursor to form a carbon-carbon composite; wherein said curing, postcuring and carbonization is a continuous process and said carbon-carbon composite has high strength.
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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) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |