US3661599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
HIGH TEMPERATURE TiC-VC STRUCTURAL MATERIALS
Assignee: Lockheed Martin Corp
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Filing: 1969-03-25
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Granted: 1972-05-09
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Expires: 1989-03-25
Abstract
Abstract The invention describes new high temperature structural materials consisting of titanium carbide vanadium carbide alloys produced by zone refining techniques. The materials are fully dense and may be either mono- or polycrystalline.
Inventors
- 👤 Graham E Hollox
- 👤 Walter Precht
- 👤 Robert G Lye
- 👤 Albert R C Westwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/5607; C04B35/5611; C30; C30B; C30B13/00; C30B29/00; C30B29/10; C30B29/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
76 words
A float zone melted fully dense, single phase, crystalline TiC-VC alloy as a structural material having a high strength-to-density ratio at high temperature, wherein said alloy consists essentially of from 90 to 10 molar percent TiC and from 10 to 90 molar percent VC and has a C : Ti plus V atomic ratio of from 0.7 : 1 to 1.0 : 1 and a compressive yield strength of at least 20 kg/mm2 at 1,600* C.
Claim 2
Dependent Claim
124 words
In a process for preparing TiC-VC alloys, in which TiC and VC powders are blended together and sintered, the improvement comprising preparing TiC-VC alloys of controlled purity, composition and stoichiometry by blending TiC and VC powders in a molar ratio of from 10 to 90% TiC and from 90 to 10% VC, adjusting the carbon content of the TiC and VC powders to an atomic ratio of C : Ti plus V of from 0.7 : 1 to 1.0 : 1 to be within the single phase region, blending the thus modified carbide powders, sintering, and then subjecting the carbides to float zone melting under 10 atm pressure, whereby the sintered material is melted and crystallized as a fully dense, crystalline TiC-VC alloy material.
Claim 3
Dependent Claim
39 words
The process of claim 3, in which the powdered material is first formed into rods, the sintered rods passed through an induction heating zone at rates varying from 0.7 cm. per hour to more than 1 METER per hour.
Claim 4
Dependent Claim
11 words
The process of claim 3, wherein said material prepared is monocrystalline.
Claim 5
Dependent Claim
11 words
The process of claim 3, wherein said material prepared is polycrystalline.
References Cited (Backward Citations)
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |