US4402744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically bonded aluminum coating for carbon via monocarbides
Assignee: Graftech International Holdings Inc
•
Filing: 1980-08-29
•
Granted: 1983-09-06
•
Expires: 2000-08-29
Abstract
Abstract An aluminum coated carbon article or composite, and process therefor having aluminum chemically bonded to carbon via an interface of a metal monocarbide formed in situ when an intermetallic phase comprising aluminum and a metal capable of reacting with carbon to form a metal carbide is reduced by carbon to aluminum and a metal carbide, the metal selected from the group consisting of tantalum, titanium and hafnium.
Inventors
- 👤 Raymond V. Sara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:35
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/89; C04B41/45; C04B41/52; C23; C23C; C23C28/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A composite material having carbon distributed in an aluminum matrix via an interfacial bond of tantalum carbide, said interfacial bond of tantalum carbide being substantially free of any aluminum carbide formed therein, wherein the atomic weight proportion of the aluminum, tantalum and carbon lies approximately within the trapezoidal area identified as c-d-e-f of the ternary constitution diagram of the aluminum-tantalum-carbon system shown in FIG. 1 of the drawings.
Claim 2
Dependent Claim
68 words
A composite material having carbon distributed in an aluminum matrix via an interfacial bond of tantalum carbide, said interfacial bond of tantalum carbide being substantially free of any aluminum carbide formed therein, wherein the atomic weight proportion of the aluminum, tantalum and carbon lies approximately within the trapezoidal area identified as c-d-e-f of the ternary constitution diagram of the aluminum-tantalum-carbon system shown in FIG. 1 of the drawings.
Claim 3
Dependent Claim
14 words
The composite material of claim 1 wherein the carbon is present in granular form.
Claim 4
Dependent Claim
14 words
The composite material of claim 1 wherein the carbon is present in fiber form.
Claim 5
Dependent Claim
69 words
A composite material having carbon distributed in an aluminum matrix via an interfacial bond of titanium carbide, said interfacial bond of titanium carbide being substantially free of any aluminum carbide formed therein, wherein the atomic weight proportions of the aluminum (-), titanium and carbon lies approximately within the trapezoidal area identified as c-d-e-f of the ternary constitution diagram of the aluminum-titanium-carbon system shown in FIG. 2 of the drawings.
Claim 6
Dependent Claim
69 words
A composite material having carbon distributed in an aluminum matrix via an interfacial bond of titanium carbide, said interfacial bond of titanium carbide being substantially free of any aluminum carbide formed therein, wherein the atomic weight proportions of the aluminum (-), titanium and carbon lies approximately within the trapezoidal area identified as c-d-e-f of the ternary constitution diagram of the aluminum-titanium-carbon system shown in FIG. 2 of the drawings.
Claim 7
Dependent Claim
16 words
A composite material as defined in claim 4 wherein the carbon is present in granular form.
Claim 8
Dependent Claim
16 words
A composite material as defined in claim 4 wherein the carbon is present in fiber form.
References Cited (Backward Citations)
US2665226A
Cited
US2665225A
Cited
US2665227A
Cited
US2703334A
Cited
US2665229A
Cited
US2929741A
Cited
US2996412A
Cited
US3016311A
Cited
US3306764A
Cited
US3348929A
Cited
US3476586A
Cited
US3348967A
Cited
US3493423A
Cited
US3432336A
Cited
US3510347A
Cited
US3419415A
Cited
GB1151071A
Cited
US3553820A
Cited
US3535093A
Cited
US3571901A
Cited
DE2043924A1
Cited
US3871834A
Cited
DE2164568B2
Cited
GB1325291A
Cited
DE2115925A1
Cited
US3835230A
Cited
US3922516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |