US4752334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion strengthened metal composites
Assignee: SCM Metal Products Inc
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Filing: 1983-12-13
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Granted: 1988-06-21
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Expires: 2003-12-13
Abstract
Abstract There is provided a substantially fully dense powdered metal composite comprising a highly conductive metal or metal alloy matrix having dispersed therein discrete microparticles of a refractory metal oxide and discrete macroparticles of an additive metal or metal alloy, such as a nickel/iron alloy. The respective components undergo minimal alloying because sintering is not utilized in forming the composite. These composites are characterized by high thermal or electrical conductivity and a desired property attributable to the composite forming additive metal or metal alloy. The composites are useful in forming lead frames for integrated circuit chips, electric lamp lead wires, and electrical contact members.
Inventors
- 👤 Anil V. Nadkarni
- 👤 Prasanna K. Samal
- 👤 James E. Synk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:20
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/12; H; H01; H01R; H01R13/00; H01R13/02; H01R13/03; B; B22; B22F; B22F1/00; B22F1/12; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/025; B22F2998/00; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10S75/951; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
95 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a metal, metal alloy or metal compound selected from the group consisting of the metals molybdenum, titanium, and niobium, the metal alloys of nickel with iron, nickel with iron and cobalt, cobalt with iron, nickel with chromium, nickel with molybdenum, chromium with molybdenum, and the metal compound titanium carbide, said components (a) and (b) being no more than minimally alloyed together.
Claim 2
Dependent Claim
95 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a metal, metal alloy or metal compound selected from the group consisting of the metals molybdenum, titanium, and niobium, the metal alloys of nickel with iron, nickel with iron and cobalt, cobalt with iron, nickel with chromium, nickel with molybdenum, chromium with molybdenum, and the metal compound titanium carbide, said components (a) and (b) being no more than minimally alloyed together.
Claim 3
Dependent Claim
18 words
A substantially fully dense composite as defined in claim 1 wherein the refractory metal oxide is aluminum oxide.
Claim 4
Dependent Claim
29 words
A substantially fully dense composite as defined in claim 2 wherein the concentration of aluminum in the matrix is in the weight range of from 0.01% to about 5%.
Claim 5
Dependent Claim
26 words
A substantially fully dense composite as defined in claim 1 wherein componenent (a) is a dispersion strengthened metal having an electrical resistivity below 8×10 -6 ohm-cm.
Claim 6
Dependent Claim
17 words
A substantially fully dense composite as defined in claim 1 wherein component (a) is dispersion strengthened copper.
Claim 7
Dependent Claim
34 words
A substantially fully dense composite as defined in claim 1 wherein component (a) is a dispersion strengthened copper, and said composite has a coefficient of thermal expansion below 13×10 -6 /°C. at 20° C.
Claim 8
Dependent Claim
18 words
A substantially fully dense composite as defined in claim 1 wherein component (a) is dispersion strengthened copper alloy.
Claim 9
Dependent Claim
38 words
A substantially fully dense unsintered powdered metal composite comprising (a) a metal alloy matrix having uniformly dispersed therein discrete microparticles of a metal oxide and (b) discrete macroparticles of an additive metal or its alloys or its compounds.
Claim 10
Dependent Claim
38 words
A substantially fully dense unsintered powdered metal composite comprising (a) a metal alloy matrix having uniformly dispersed therein discrete microparticles of a metal oxide and (b) discrete macroparticles of an additive metal or its alloys or its compounds.
Claim 11
Dependent Claim
19 words
A substantially fully dense composite as defined in claim 8 wherein said additive metal or its alloy is molybdenum,--or--niobium.
Claim 12
Dependent Claim
97 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a copper-tin alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a metal, metal alloy or metal compound selected from the group consisting of the metals molybdenum, tungsten, titanium, and niobium, the metal alloys of nickel with iron, nickel with cobalt and iron, cobalt with iron, nickel with chromium, nickel with molybdenum, chromium with molybdenum, and the metal compounds tungsten carbide and titanium carbide, said components (a) and (b) being no more than minimally alloyed together.
Claim 13
Dependent Claim
97 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a copper-tin alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a metal, metal alloy or metal compound selected from the group consisting of the metals molybdenum, tungsten, titanium, and niobium, the metal alloys of nickel with iron, nickel with cobalt and iron, cobalt with iron, nickel with chromium, nickel with molybdenum, chromium with molybdenum, and the metal compounds tungsten carbide and titanium carbide, said components (a) and (b) being no more than minimally alloyed together.
Claim 14
Dependent Claim
26 words
A substantially fully dense composite as defined in claim 10 wherein the metal alloy of nickel and iron contains from 30% to 55% nickel by weight.
Claim 15
Dependent Claim
24 words
A substantially fully dense composite as defined in claim 11 wherein the metal alloy of nickel and iron contains about 42% by weight nickel.
Claim 16
Dependent Claim
109 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of metal, metal alloy or metal compound selected from the group consisting of the metals molybdenum, tungsten, titanium, and niobium, the metal alloys of nickel with iron, nickel with iron and cobalt, cobalt with iron, nickel with chromium, nickel with molybdenum, chromium with molybdenum, and the metal compounds tungsten carbide and titanium carbide, said components (a) and (b) being no more than minimally alloyed together wherein the composite is contained within at least one metallic sheath.
Claim 17
Dependent Claim
109 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of metal, metal alloy or metal compound selected from the group consisting of the metals molybdenum, tungsten, titanium, and niobium, the metal alloys of nickel with iron, nickel with iron and cobalt, cobalt with iron, nickel with chromium, nickel with molybdenum, chromium with molybdenum, and the metal compounds tungsten carbide and titanium carbide, said components (a) and (b) being no more than minimally alloyed together wherein the composite is contained within at least one metallic sheath.
Claim 18
Dependent Claim
16 words
A substantially fully dense composite as defined in claim 13 wherein the metallic sheath is nickel.
Claim 19
Dependent Claim
16 words
A substantially fully dense composite as defined in claim 13 wherein the metallic sheath is copper.
Claim 20
Dependent Claim
55 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a metal oxide and (b) discrete macroparticles of an additive metal, or its alloys, or its intermetallic compounds, and wherein the composite is contained within at least one metallic sheath.
Claim 21
Dependent Claim
55 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a metal oxide and (b) discrete macroparticles of an additive metal, or its alloys, or its intermetallic compounds, and wherein the composite is contained within at least one metallic sheath.
Claim 22
Dependent Claim
16 words
A substantially fully dense composite as defined in claim 16 wherein the metallic sheath is nickel.
Claim 23
Dependent Claim
16 words
A substantially fully dense composite as defined in claim 16 wherein the metallic sheath is copper.
Claim 24
Dependent Claim
48 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) dispersion strengthened copper having uniformly dispersed therein discrete microparticles of aluminum oxide and (b) discrete macroparticles of a metal alloy of nickel with iron, said components (a) and (b) being no more than minimally alloyed together.
Claim 25
Dependent Claim
48 words
A substantially fully dense compacted and unsintered powdered metal composite comprising (a) dispersion strengthened copper having uniformly dispersed therein discrete microparticles of aluminum oxide and (b) discrete macroparticles of a metal alloy of nickel with iron, said components (a) and (b) being no more than minimally alloyed together.
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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) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |