US4306907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Age hardened beryllium alloy and cermets
Assignee: Charles Stark Draper Laboratory Inc
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Filing: 1980-09-12
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Granted: 1981-12-22
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Expires: 2000-09-12
Abstract
Abstract Process for the formation of precipitation hardened beryllium-nickel, beryllium-iron, and beryllium-cobalt alloys and cermets for structural and bearing use respectively in precision instruments and such alloys and cermets. A beryllium-nickel, -iron, or -cobalt high solute solution at elevated temperature is rapidly cooled to provide a readily machined solid solution. After machining, the alloy is reheated to an intermediate temperature under controlled conditions where precipitation hardening occurs through limited precipitate cluster formation. A cermet is formed in the process with the addition of a ceramic material to the beryllium alloy in the initial steps.
Inventors
- 👤 Byong-Ho Ahn
- 👤 Dilip K. Das
- 👤 Kaplesh Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:08
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/05; C22C1/051
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
A process for the formation of a cermet for use as a bearing in precision instruments comprising the steps of: consolidating powders consisting of beryllium and a non-beryllium based ceramic selected from the group consisting of titanium diboride, titanium carbide, titanium nitride, tantalum carbide, zirconium carbide, vanadium carbide, aluminum oxide, chromium oxide, tantalum oxide, silicon nitride, boron carbide and boron nitride in a ratio of 30 to 60 volume percent ceramic by cold processing; and densifying the consolidated powders by hot isostatic pressing.
Claim 2
Dependent Claim
83 words
A process for the formation of a cermet for use as a bearing in precision instruments comprising the steps of: consolidating powders consisting of beryllium and a non-beryllium based ceramic selected from the group consisting of titanium diboride, titanium carbide, titanium nitride, tantalum carbide, zirconium carbide, vanadium carbide, aluminum oxide, chromium oxide, tantalum oxide, silicon nitride, boron carbide and boron nitride in a ratio of 30 to 60 volume percent ceramic by cold processing; and densifying the consolidated powders by hot isostatic pressing.
Claim 3
Dependent Claim
13 words
A beryllium cermet product formed in accordance with the process of claims 1.
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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |