US4927792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molybdenum disilicide matrix composite
Assignee: Los Alamos National Security LLC
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Filing: 1989-06-05
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Granted: 1990-05-22
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Expires: 2009-06-05
Abstract
Abstract A composition consisting of an intermetallic compound, molybdenum disilicide, which is reinforced with VS silicon carbide whiskers dispersed throughout it and a method of making the reinforced composition. Use of the reinforcing material increases fracture toughness at low temperatures and strength at high temperatures, as compared to pure molybdenum disilicide.
Inventors
- 👤 John J. Petrovic
- 👤 David H. Carter
- 👤 Frank D. Gac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/58085; C04B35/58092; C04B35/622; C04B35/64; C04B35/645; C04B35/71; C04B35/78; C04B35/80
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
60 words
A composition of matter consisting of molybdenum disilicide reinforced with silicon carbide whiskers dispersed throughout it, where each whisker is a single crystal having an aspect ratio of from about 5:1 to about 15:1 and where the dimensions of each whisker are from about 1 to about 5 microns long and from about 0.1 to about 0.5 micron in diameter.
Claim 2
Dependent Claim
60 words
A composition of matter consisting of molybdenum disilicide reinforced with silicon carbide whiskers dispersed throughout it, where each whisker is a single crystal having an aspect ratio of from about 5:1 to about 15:1 and where the dimensions of each whisker are from about 1 to about 5 microns long and from about 0.1 to about 0.5 micron in diameter.
Claim 3
Dependent Claim
22 words
The composition of claim 1 where said whiskers are present in an amount of from about 10 to about 30 volume percent.
References Cited (Backward Citations)
US4543345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |