US4853294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon fiber reinforced metal matrix composites
Assignee: United States Department of the Navy
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Filing: 1988-06-28
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Granted: 1989-08-01
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Expires: 2008-06-28
Abstract
Abstract An improved metal, alloy, or intermetallic matrix composite containing carbon reinforcing fibers is formed. The carbon reinforcing fibers are protected from interaction with the matrix material by an inner and an outer barrier layer. The outer layer is any one of the group of stable, non-reactive ceramic materials used to protect fibers, and the inner layer is a ductile, low density, oxygen desorbing rare earth metal. The carbon fibers are particularly useful in forming composites with a titanium aluminide matrix.
Inventors
- 👤 Richard K. Everett
- 👤 William F. Henshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:18
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/02; C22C49/04; C22C49/14; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12625
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
55 words
A composite comprising: a matrix material selected from the group consisting of pure metal, and metal alloys, and an inner barrier layer of a ductile, low density, oxygen absorbing rare earth metal covering the surface of said fiber, and an outer barrier layer of stable non-matrix-reactive material contiguous with and covering said inner barrier layer.
Claim 2
Dependent Claim
55 words
A composite comprising: a matrix material selected from the group consisting of pure metal, and metal alloys, and an inner barrier layer of a ductile, low density, oxygen absorbing rare earth metal covering the surface of said fiber, and an outer barrier layer of stable non-matrix-reactive material contiguous with and covering said inner barrier layer.
Claim 3
Dependent Claim
16 words
The composite of claim 1 wherein the matrix material is a an intermetallic compound containing titanium.
Claim 4
Dependent Claim
12 words
The composite of claim 2 wherein the matrix material is titanium aluminide.
Claim 5
Dependent Claim
20 words
The composite of claim wherein the rare earth metal i selected from the group consisting of gadolinium, yttrium and erbium.
Claim 6
Dependent Claim
21 words
The composite of claim 2 wherein the rare earth metal is selected from the group consisting of gadolinium, yttrium and erbium.
Claim 7
Dependent Claim
21 words
The composite of claim 3 wherein the rare earth metal is selected from the group consisting of gadolinium yttrium and erbium.
Claim 8
Dependent Claim
12 words
The composite of claim 4 wherein the rare earth metal is gadolinium.
Claim 9
Dependent Claim
12 words
The composite of claim 5 wherein the rare earth metal is gadolinium.
Claim 10
Dependent Claim
12 words
The composite of claim 6 wherein the rare earth metal is gadolinium.
Claim 11
Dependent Claim
12 words
The composite of claim 2 wherein the outer barrier layer is Alumina.
Claim 12
Dependent Claim
12 words
The composite of claim 3 wherein the outer barrier layer is Alumina.
Claim 13
Dependent Claim
12 words
The composite of claim 5 wherein the outer barrier layer is Alumina.
Claim 14
Dependent Claim
12 words
The composite of claim 6 wherein the outer barrier layer is Alumina.
Claim 15
Dependent Claim
12 words
The composite of claim 8 wherein the outer barrier layer is Alumina.
Claim 16
Dependent Claim
12 words
The composite of claim 9 wherein the outer barrier layer is Alumina.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |