US5059490A
Expired / Lapsed
US
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Metal-ceramic composites containing complex ceramic whiskers
Assignee: Lockheed Martin Corp
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Filing: 1989-06-15
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Granted: 1991-10-22
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Expires: 2009-06-15
Abstract
Abstract The present invention relates to the formation of whisker reinforced metal matrix composites in which complex boride or carbide whiskers having an aspect ratio of greater than 10:1 are distributed throughout a metal, metal alloy, or intermetallic matrix. Exemplary complex boride whiskers include TiNbB, TiTaB, TiVB, NbHfB, and TiNbMoB. Exemplary complex carbide whiskers include TiNbC, TiVC, TiZrC, TiHfC, and TiTaC. A method for the in-situ formation of complex boride and complex carbide whiskers within metallic matrices is disclosed which involves reacting a mixture of individual complex ceramic-forming constituents in the presence of a metal to precipitate the desired complex ceramic whiskers in a metal matrix.
Inventors
- 👤 John M. Brupbacher
- 👤 Leontios Christodoulou
- 👤 Dennis C. Nagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:48
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/05; C22C1/051; B; B22; B22F; B22F3/00; B22F3/23; B22F9/00; B22F9/02; B22F9/14; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; B23K35/40; B82; B82Y; B82Y30/00; C22C1/10; C22C1/1005; C22C1/1015; C22C1/1036; C22C1/1047; C22C1/1052; C22C1/1068; C22C29/00; C22C32/00; C22C32/0047; C22C32/0078; C22C47/00; C22C47/02; C22C47/06; C22C47/08; C22C49/00; C22C49/14; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
28 words
A composite material comprising in-situ precipitated complex boride whiskers distributed throughout a solvent metal matrix wherein the complex boride whiskers have an aspect ratio of greater than 10:1.
Claim 2
Dependent Claim
28 words
A composite material comprising in-situ precipitated complex boride whiskers distributed throughout a solvent metal matrix wherein the complex boride whiskers have an aspect ratio of greater than 10:1.
Claim 3
Dependent Claim
36 words
The composite material of claim 1, wherein the complex boride whiskers are composed of boron and at least two elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W.
Claim 4
Dependent Claim
22 words
The composite material of claim 2, wherein the complex boride whiskers are TiNbB, TiTaB, TiHfB, TiVB, NbHfB, TiNbMoB, or a combination thereof.
Claim 5
Dependent Claim
18 words
The composite material of claim 2, wherein the solvent metal matrix comprises a metal, metal alloy or intermetallic.
Claim 6
Dependent Claim
17 words
The composite material of claim 4, wherein the solvent metal matrix comprises aluminum, or an alloy thereof.
Claim 7
Dependent Claim
19 words
The composite material of claim 4, wherein the solvent metal matrix comprises an aluminide of titanium, nickel or niobium.
Claim 8
Dependent Claim
19 words
The composite material of claim 6, wherein the solvent metal matrix comprises TiAl3, TiAl, Ti3Al, or a combination thereof.
Claim 9
Dependent Claim
25 words
The composite material of claim 2, wherein the complex boride whiskers comprise from about 5 volume percent to about 80 volume percent of the composite.
Claim 10
Dependent Claim
22 words
The composite material of claim 2, wherein the complex boride whiskers range in diameter from about 1 micron to about 5 microns.
Claim 11
Dependent Claim
22 words
The composite material of claim 9, wherein the complex boride whiskers range in length from about 5 microns to about 200 microns.
Claim 12
Dependent Claim
22 words
The composite material of claim 2, wherein the complex boride whiskers range in diameter from about 1 micron to about 3 microns.
Claim 13
Dependent Claim
22 words
The composite material of claim 11, wherein the complex boride whiskers range in length from about 5 microns to about 50 microns.
Claim 14
Dependent Claim
25 words
The composite material of claim 2, wherein the complex boride whiskers are TiNbB and the solvent metal matrix is TiAl, Ti3Al or a combination thereof.
Claim 15
Dependent Claim
54 words
A composite material comprising in-situ precipitated complex carbide whiskers distributed throughout a solvent metal matrix wherein the complex carbide whiskers have an aspect ratio of greater than 10:1 and are composed of carbon and at least two elements selected from the groups consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W.
Claim 16
Dependent Claim
54 words
A composite material comprising in-situ precipitated complex carbide whiskers distributed throughout a solvent metal matrix wherein the complex carbide whiskers have an aspect ratio of greater than 10:1 and are composed of carbon and at least two elements selected from the groups consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W.
Claim 17
Dependent Claim
21 words
The composite material of claim 14, wherein the complex carbide whiskers are TiNbC, TiVC, TiZrC, TiHfC, TiTaC, or a combination thereof.
Claim 18
Dependent Claim
18 words
The composite material of claim 14, wherein the solvent metal matrix comprises a metal, metal alloy or intermetallic.
Claim 19
Dependent Claim
17 words
The composite material of claim 16, wherein the solvent metal matrix comprises aluminum, or an alloy thereof.
Claim 20
Dependent Claim
19 words
The composite material of claim 16, wherein the solvent metal matrix comprises an aluminide of titanium, nickel or niobium.
Claim 21
Dependent Claim
19 words
The composite material of claim 18, wherein the solvent metal matrix comprises TiAl3, TiAl, Ti3Al, or a combination thereof.
Claim 22
Dependent Claim
25 words
The composite material of claim 14, wherein the complex carbide whiskers comprise from about 5 volume percent to about 80 volume percent of the composite.
Claim 23
Dependent Claim
22 words
The composite material of claim 14, wherein the complex carbide whiskers range in diameter from about 1 micron to about 5 microns.
Claim 24
Dependent Claim
22 words
The composite material of claim 21, wherein the complex carbide whiskers range in length from about 5 microns to about 200 microns.
Claim 25
Dependent Claim
22 words
The composite material of claim 14, wherein the complex carbide whiskers range in diameter from about 1 micron to about 3 microns.
Claim 26
Dependent Claim
22 words
The composite material of claim 23, wherein the complex carbide whiskers range in length from about 5 microns to about 50 microns.
Claim 27
Dependent Claim
25 words
The composite material of claim 14, wherein the complex carbide whiskers are TiVC and the solvent metal matrix is TiAl, Ti3Al or a combination thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |