US4626515A
Expired / Lapsed
US
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Reinforced alkaline earth aluminosilicate glasses
Assignee: Corning Glass Works
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Filing: 1985-04-15
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Granted: 1986-12-02
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Expires: 2005-04-15
Abstract
Abstract The present invention is directed to the preparation hybrid composite bodies composed of an essentially alkali-free, alkaline earth aluminosilicate glass matrix reinforced with SiC whiskers and continuous ceramic fibers.
Inventors
- 👤 Kenneth Chyung
- 👤 Kishor P. Gadkaree
- 👤 Mark P. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:04
CPC Classifications
C; C03; C03C; C03C14/00; C03C14/002; C03C2214/00; C03C2214/02; C03C2214/06; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/252
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A SiC whisker and continuous ceramic fiber reinforced glass matrix hybrid composite body consisting essentially of about 5-60% by weight deagglomerated SiC whiskers having a thickness less than 100 microns with a length-to-diameter ratio of at least 10 and about 15-70% by volume ceramic fibers substantially uniformly distributed in an essentially alkali-free, alkaline earth aluminosilicate glass matrix, the total content of whiskers + fibers not exceeding about 70% by weight.
Claim 2
Dependent Claim
70 words
A SiC whisker and continuous ceramic fiber reinforced glass matrix hybrid composite body consisting essentially of about 5-60% by weight deagglomerated SiC whiskers having a thickness less than 100 microns with a length-to-diameter ratio of at least 10 and about 15-70% by volume ceramic fibers substantially uniformly distributed in an essentially alkali-free, alkaline earth aluminosilicate glass matrix, the total content of whiskers + fibers not exceeding about 70% by weight.
Claim 3
Dependent Claim
32 words
A composite body according to claim 1 wherein said ceramic fibers are selected from the group of SiC, graphite, BN, B 4 C, ZrO 2 , zircon, mullite, spinel, alumina, and glass.
Claim 4
Dependent Claim
47 words
A composite body according to claim 1 wherein said glass matrix consists essentially, expressed in terms of weight percent on the oxide basis, of about: SiO 2 : 57.0 B 2 O 3 : 4.0 Al 2 O 3 : 16.0 BaO: 6.0 CaO: 10.0 MgO: 7.0.
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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |