US4072516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite fiber/metal composites
Assignee: Fiber Materials Inc
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Filing: 1975-09-15
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Granted: 1978-02-07
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Expires: 1995-09-15
Abstract
Abstract A novel graphite fiber/metal composite material in which the graphite fibers have an adherent coating of silicon oxide and silicon carbide. The coating protects the graphite surface from attack by carbide forming matrix metals such as aluminum, titanium, magnesium and nickel. In a preferred embodiment of the invention the coating is formed by an intermediate temperature vapor deposition technique involving the reduction of silicon tetrachloride in the presence of hydrogen and an oxygen containing gas.
Inventors
- 👤 Roger T. Pepper
- 👤 Thomas A. Zack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
33 words
A composite product comprising a plurality of carbon fibers each having a coating of a mixture of silicon oxide and silicon carbide, said fibers being disposed in a substantially solid matrix of metal.
Claim 2
Dependent Claim
33 words
A composite product comprising a plurality of carbon fibers each having a coating of a mixture of silicon oxide and silicon carbide, said fibers being disposed in a substantially solid matrix of metal.
Claim 3
Dependent Claim
40 words
A composite as defined in claim 1 wherein said metal is a carbide forming metal selected from the group consisting of aluminum, magnesium, titanium, nickel, alloys of said metals, and alloys which comprise one of said metals in major proportion.
Claim 4
Dependent Claim
13 words
A composite as defined in claim 1 wherein said fibers are substantially graphite.
Claim 5
Dependent Claim
24 words
A composite was defined in claim 1 wherein the thickness of said coating is in the range of between about 100 to 10,000 Angstroms.
Claim 6
Dependent Claim
12 words
A composite as defined in claim 3 wherein said metal comprises aluminum.
Claim 7
Dependent Claim
12 words
A composite as defined in claim 3 wherein said metal comprises magnesium.
Claim 8
Dependent Claim
12 words
A composite as defined in claim 3 wherein said metal comprises titanium.
References Cited (Backward Citations)
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Cited
US3770488A
Cited
US3811920A
Cited
US3833402A
Cited
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Cited
US3894863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |