Patent US4916030A successfully refreshed from Google Patents.
US4916030A
Expired / Lapsed
US
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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 09:02
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.
References Cited (Backward Citations)
US2852366A
Cited
US3037857A
Cited
US3194656A
Cited
US3415697A
Cited
US3885959A
Cited
US3690849A
Cited
US3547673A
Cited
US3690875A
Cited
US3672849A
Cited
US3666436A
Cited
US3726643A
Cited
US3785807A
Cited
US3705791A
Cited
US3877884A
Cited
US3858640A
Cited
US3961995A
Cited
US4161512A
Cited
US4431448A
Cited
US4444603A
Cited
US4514268A
Cited
US4726842A
Cited
JPS59219444A
Cited
US4540546A
Cited
US4690796A
Cited
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 |