US4916030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-second phase composites
Assignee: Lockheed Martin Corp
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Filing: 1987-09-29
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Granted: 1990-04-10
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Expires: 2007-09-29
Abstract
Abstract A method is taught for the introduction of in-situ precipitated second phase materials, such as ceramic or intermetallic particles in a metal matrix, to a host metal. When an initial solvent-assisted reaction is utilized, metal-second phase composites having highly superior properties may be obtained. The invention may utilize the reaction of the second phase-forming constituents in a solvent metal medium to provide an intermediate material of finely-dispersed second phase particles in an intermediate metal matrix, in the form of a porous mass or sponge. Any desired loading of second phase in the final composite may be achieved by the admixture of this preformed intermediate material having a relatively high content of particulate material, with a molten host metal. Exemplary materials include titanium diboride in an aluminum matrix and titanium carbide in an aluminum matrix.
Inventors
- 👤 Leontios Christodoulou
- 👤 Dennis C. Nagle
- 👤 John M. Brupbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:04
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: 13
Claim 1
Independent Claim
37 words
A metal matrix composite comprising a final metal, metal alloy, or intermetallic matrix consisting of intermediate metal and host metal, having uniformly dispersed therein at least about 5 volume percent of substantially unagglomerated in-situ precipitated second-phase particles.
Claim 2
Dependent Claim
37 words
A metal matrix composite comprising a final metal, metal alloy, or intermetallic matrix consisting of intermediate metal and host metal, having uniformly dispersed therein at least about 5 volume percent of substantially unagglomerated in-situ precipitated second-phase particles.
Claim 3
Dependent Claim
15 words
The composite of claim 1, comprising titanium diboride particles in a final matrix comprising aluminum.
Claim 4
Dependent Claim
15 words
The composite of claim 1, comprising titanium carbide particles in a final matrix comprising aluminum.
Claim 5
Dependent Claim
41 words
A cast metal matrix composite ingot comprising a final metal, metal alloy, or intermetallic matrix consisting of intermediate metal and host metal, said matrix having a fine grain size, and having substantially uniformly dispersed therein substantially unagglomerated in-situ precipitated second-phase particles.
Claim 6
Dependent Claim
41 words
A cast metal matrix composite ingot comprising a final metal, metal alloy, or intermetallic matrix consisting of intermediate metal and host metal, said matrix having a fine grain size, and having substantially uniformly dispersed therein substantially unagglomerated in-situ precipitated second-phase particles.
Claim 7
Dependent Claim
20 words
A cast metal matrix composite ingot as set forth in claim 4, wherein the grain size is about one micron.
Claim 8
Dependent Claim
22 words
A cast metal matrix composite ingot as set forth in claim 4, consisting of titanium carbide in a final matrix comprising aluminum.
Claim 9
Dependent Claim
21 words
A cast metal matrix composite ingot as set forth in claim 4, comprising titanium diboride in a final matrix comprising aluminum.
Claim 10
Dependent Claim
28 words
A cast metal matrix composite ingot as set forth in claim 4, wherein the volume percent of second-phase particles is from about 5 percent to about 30 percent.
Claim 11
Dependent Claim
25 words
A cast metal matrix composite ingot as set forth in claim 8, wherein the second-phase particle size is from about 0.01 to about 5 microns.
Claim 12
Dependent Claim
20 words
A cast metal matrix composite ingot as set forth in claim 9, wherein the grain size is about one micron.
Claim 13
Dependent Claim
31 words
A cast metal matrix composite ingot as set forth in claim 4, wherein the composite may be remelted and recast without substantially effecting second-phase particle size or final matrix grain size.
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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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |