Patent EP0336648A2 successfully refreshed from Google Patents.
EP0336648A2
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EP
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Process for producing carbon/carbon composite having oxidation resistance
Assignee: National Aerospace Laboratory of Japan
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Filing: 1989-03-30
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Granted: —
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Expires: 2009-03-30
Abstract
Abstract A carbon/carbon composite having oxidation resistance is produced by filling the voids of a carbon/carbon composite comprising 10-70% by volume of carbon fibers and 5-90% by volume of a carbonaceous matrix and having a void percentage of 10-55%, with at least one of carbon and a ceramic by chemical vapor infiltration and then coating the deposit surface with a ceramic or both ceramic and carbon by chemical vapor deposition.
Inventors
- 👤 Seiichi Uemura
- 👤 Yoshio Sohda
- 👤 Yasuji Ido
- 👤 Toshio Hirai
- 👤 Makoto Sasaki
- 👤 Masayuki Niino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:37
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B41/45; C04B41/52; C04B41/526; C04B41/80; C04B41/81; C04B41/89; Y; Y10; Y10S; Y10S427/00; Y10S427/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A process for producing a carbon/carbon composite having oxidation resistance, which process comprises filling the voids of a carbon/carbon composite comprising 10-70% by volume of carbon fibers and 5-90% by volume of a carbonaceous matrix and having a void percentage of 10-55%, with at least one of carbon and a ceramic by chemical vapor infiltration (CVI) and then coating the deposit surface with a ceramic or both ceramic and carbon by chemical vapor deposition (CVD).
Claim 2
Dependent Claim
75 words
A process for producing a carbon/carbon composite having oxidation resistance, which process comprises filling the voids of a carbon/carbon composite comprising 10-70% by volume of carbon fibers and 5-90% by volume of a carbonaceous matrix and having a void percentage of 10-55%, with at least one of carbon and a ceramic by chemical vapor infiltration (CVI) and then coating the deposit surface with a ceramic or both ceramic and carbon by chemical vapor deposition (CVD).
Claim 3
Dependent Claim
60 words
A process as set forth in Claim 1, wherein the CVI and the CVD are different in at least one of texture, structure and composition, and at least one of temperature, pressure feed gas rate and feed gas ratio is changed continuously in said vapor phase decompositions for a continuous change in at least one of texture, structure and composition.
Claim 4
Dependent Claim
40 words
A process as set forth in Claim 1 or Claim 2, wherein said carbon/carbon composite having a void percentage of 10-55% has been obtained by impregnating a carbon fiber fabric with a carbonaceous pitch and then carbonizing said carbonaceous pitch.
Claim 5
Dependent Claim
31 words
A process as set forth in any one of Claims 1 to 3, wherein a hydrocarbon having 1 to 6 carbon atoms is used as a decomposition gas for obtaining carbon.
Claim 6
Dependent Claim
28 words
A process as set forth in any one of Claims 1 to 4, wherein said ceramic material is SiC, ZrC, TiC, HfC, B₄C, NbC, WC, TiB₂, or Si₃N₄.
Claim 7
Dependent Claim
48 words
A process as set forth in any one of Claims 1 to 5, wherein as a decomposition gas for obtaining the ceramic material there is used a halide or hydride of Si, Zr, Ti, Hf, B, Nb, W or Ti, or a combination thereof with a hydrocarbon gas.
Claim 8
Dependent Claim
35 words
A process as set forth in any one of Claims 1 to 6, wherein the chemical vapor infiltration is performed at a temperature of 1,000° to 1,500°C and a pressure of 0.1 to 50 Torr.
Claim 9
Dependent Claim
35 words
A process as set forth in any one of Claims 1 to 7, wherein the chemical vapor deposition is performed at a temperature of 1,000° to 2,000°C and a pressure of 50 to 760 Torr.
References Cited (Backward Citations)
No citation records indexed.
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