US4863773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material with matrix and reinforcing fibers of carbon
Assignee: Airbus Group SAS
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Filing: 1988-02-23
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Granted: 1989-09-05
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Expires: 2008-02-23
Abstract
Abstract Composite material with matrix and reinforcing fibres of carbon and its production process. The composite material according to the invention comprises a substrate (2) of carbon fibres covered with a fine silicon carbide coating (6) and embedded in a carbon matrix (4) containing 2 to 10% by weight silicon carbide, an outer silicon carbide covering (10), followed by a first filling of the cracks with silica (14) and a second filling with borosilicate glass (16) (SiO 2 -B 2 O 3 ). This unoxidizable material can in particular be used as a heat shield for a spacecraft.
Inventors
- 👤 Gerard Rousseau
- 👤 Nicole Pastureau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:13
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/515; C04B35/52; C04B35/524; C04B35/622; C04B35/626; C04B35/628; C04B35/62844; C04B35/62857; C04B35/6286; C04B35/62863; C04B35/62884; C04B35/62894; C04B35/62897; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/38; C04B2235/3817; C04B2235/3826; C04B2235/48; C04B2235/483; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5248; C04B2235/5252; C04B2235/70; C04B2235/74; C04B2235/77; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/29; Y10T428/2913; Y10T428/2915; Y10T428/2918; Y10T428/292; Y10T428/2933; Y10T428/2938; Y10T428/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
Composite material comprising a carbon fiber substrate embedded in a matrix (4), each fiber (2) being covered with a first fine silicon carbide coating (6), said matrix (4) being made of carbon doped with amorphous silicon carbide which represents at the most 20% by weight of said matrix, an outer silicon carbide covering (10) protecting said matrix (4), and a plug of cracks (12) of said outer covering (10), said plug comprising a borosilicate glass (16).
Claim 2
Dependent Claim
76 words
Composite material comprising a carbon fiber substrate embedded in a matrix (4), each fiber (2) being covered with a first fine silicon carbide coating (6), said matrix (4) being made of carbon doped with amorphous silicon carbide which represents at the most 20% by weight of said matrix, an outer silicon carbide covering (10) protecting said matrix (4), and a plug of cracks (12) of said outer covering (10), said plug comprising a borosilicate glass (16).
Claim 3
Dependent Claim
21 words
Composite material according to claim 1, characterized in that the matrix (4) contains 2 to 10% by weight of silicon carbide.
Claim 4
Dependent Claim
13 words
Composite material according to claim 1, wherein the substrate is obtained by weaving.
Claim 5
Dependent Claim
20 words
Composite material according to claim 1, characterized in that the filling of the outer covering comprises a silica filling (14).
Claim 6
Dependent Claim
45 words
Composite material according to claim 1, characterized in that the outer silicon carbide covering (10) is filled with a first silicon monoxide filling (14) and then a second SiO 2 --B 2 O 3 glass filling (16), the second filling (16) constituting the outer covering.
Claim 7
Dependent Claim
28 words
Composite material according to claim 1, characterized in that each fibre (2) is provided with a second thin carbon coating (8) in contact with the first coating (6).
Claim 8
Dependent Claim
26 words
Composite material according to claim 1, characterized in that, beneath the outer SiC covering (10), it has an underlying carbon - silicon carbide composite coating (13).
Claim 9
Dependent Claim
24 words
Composite material according to claim 1, characterized in that the outer silicon carbide covering (10) has a thickness of at the most 600 micrometers.
Claim 10
Dependent Claim
21 words
Composite material according to claim 1, characterized in that the first coating (6) has a thickness of 0.1 to 0.2 micrometer.
Claim 11
Dependent Claim
22 words
Composite material according to claim 6, characterized in that the second coating (8) has a thickness of at the most 0.1 micrometer.
References Cited (Backward Citations)
FR1594182A
Cited
FR2104563A5
Cited
US4722762A
Cited
US4425407A
Cited
FR2533501A1
Cited
EP0121797A2
Cited
EP0127491A1
Cited
EP0133315A1
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US4795677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |