US3991928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating titanium alloy matrix composite materials
Assignee: RTX Corp
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Filing: 1974-08-22
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Granted: 1976-11-16
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Expires: 1994-08-22
Abstract
Abstract Fiber-reinforced titanium alloy composite materials and their manufacture are disclosed. Beta-titaium alloy foils are alternated with arrays or silicon carbide coated boron fibers and consolidated at a pressure of at least 22 ksi within the temperature range of 1250°-1275° F.
Inventors
- 👤 Leonard A. Friedrich
- 👤 David A. Rutz
- 👤 Louis E. Dardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:54
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/02; C22C47/06; C22C47/062; C22C47/068; C22C47/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A method of producing a composite metallic material comprising the steps of: arranging a plurality of silicon coated boron fibers in evenly spaced relationship on a first surface of a beta-titanium alloy foil; stacking a plurality of foil-fiber arrangements to provide a multilayer structure consisting of alternate layers of foil and fibers having a fiber volume fraction of 45-65 percent; compacting the multilayer structure by applying a pressure of at least 22 ksi; and subjecting the multilayer structure to a temperature in the range of 1250° F to 1275° F while maintaining the application of pressure.
Claim 2
Independent Claim
96 words
A method of producing a composite metallic material comprising the steps of: arranging a plurality of silicon coated boron fibers in evenly spaced relationship on a first surface of a beta-titanium alloy foil; stacking a plurality of foil-fiber arrangements to provide a multilayer structure consisting of alternate layers of foil and fibers having a fiber volume fraction of 45-65 percent; compacting the multilayer structure by applying a pressure of at least 22 ksi; and subjecting the multilayer structure to a temperature in the range of 1250° F to 1275° F while maintaining the application of pressure.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the steps of compacting and simultaneously subjecting the multilayer structure to an elevated temperature are performed in a vacuum.
Claim 4
Dependent Claim
23 words
The method of claim 2 further comprising: selecting the beta-titanium alloy foil from a group of alloys including Ti-6Al-4V, Ti-13V-11Cr-3Al, Ti-11.5Mo-6Cr-4.5Sn and Ti-3Al-8V-6Cr-4Mo-4Zr.
Claim 5
Dependent Claim
30 words
The method of claim 3 wherein the step of positioning comprises: fugitive binding the fibers with a material which decomposes to form gaseous reaction products during the vacuum hot compacting.
Claim 6
Dependent Claim
23 words
The method of claim 1 further comprising: selecting the beta-titanium alloy foil from a group of alloys including Ti-6Al-4V, Ti-13V-11Cr-3Al, Ti-11.5Mo-6Cr-4.5Sn and Ti-3Al-8V-6Cr-4Mo-4Zr.
Claim 7
Dependent Claim
25 words
The method of claim 1 wherein the step at positioning comprises: fugitive binding the fibers with a material which evaporates during the vacuum hot compacting.
Claim 8
Dependent Claim
37 words
A fiber-reinforced composite material produced in accordance with the process of claim 2 and comprising hot vacuum pressed alternate layers of a beta-titanium alloy foil and evenly spaced silicon coated boron fibers having a high length-to-diameter ratio.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |