US5080963A
Expired / Lapsed
US
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Mixed fiber composite structures high surface area-high conductivity mixtures
Assignee: Auburn University
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Filing: 1989-05-24
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Granted: 1992-01-14
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Expires: 2009-05-24
Abstract
Abstract A new class of composites results from a matrix of carbon fibers, including graphite fibers, interwoven in a network of fused metal fibers. The composites can be fabricated to have varying surface area, void volume, and pore size while maintaining high electrical conductivity. Composites are readily prepared from a preform of a dispersion of carbon fibers, metal fibers, and an organic binder such as cellulose, by heating the preform at a temperature sufficient to fuse the metal fibers and to volatilize at least 90% of the binder with a loss of less than about 25%, and usually under 10%, by weight of carbon fiber.
Inventors
- 👤 Bruce J. Tatarchuk
- 👤 Millard F. Rose
- 👤 Aravamuthan Krishnagopalan
- 👤 John N. Zabasajja
- 👤 David A. Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:19
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/002; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; H; H01; H01G; H01G11/00; H01G11/22; H01G11/26; H01G11/30; H01G11/32; H01G11/40; H01G11/66; H01G11/70; H01G11/72; H01G11/38; H01G11/52; Y; Y02; Y02E; Y02E60/00; Y02E60/13; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12424; Y10T428/12444; Y10T428/29; Y10T428/2913; Y10T428/298; Y10T428/30; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/614; Y10T442/615; Y10T442/618; Y10T442/624
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
18 words
A composite comprising a matrix consisting essentially of carbon fibers interlocked in a network of fused metal fibers.
Claim 2
Dependent Claim
18 words
A composite comprising a matrix consisting essentially of carbon fibers interlocked in a network of fused metal fibers.
Claim 3
Dependent Claim
20 words
The composite of claim 1 where the composite contains from about 1% to about 98% by weight of carbon fibers.
Claim 4
Dependent Claim
20 words
The composite of claim 1 where the carbon fibers have a diameter from about 20 nm to about 1 mm.
Claim 5
Dependent Claim
22 words
The composite of claim 1 where the carbon fibers have a surface area between 1 and about 1500 square meters per gram.
Claim 6
Dependent Claim
22 words
The composite of claim 4 where the carbon fibers have a surface area between about 50 and 1350 square meters per gram.
Claim 7
Dependent Claim
23 words
The composite of claim 5 where the carbon fibers have a surface area between about 250 and about 1000 square meters per gram.
Claim 8
Dependent Claim
22 words
The composite of claim 1 further characterized in having a surface area from about 0.001 to about 1350 square meters per gram.
Claim 9
Dependent Claim
19 words
The composite of claim 1 where the metal fibers have a diameter from about 1 to about 10 microns.
Claim 10
Dependent Claim
14 words
The composite of claim 1 containing from about 20 to about 98% carbon fibers.
Claim 11
Dependent Claim
48 words
The composite of claim 1 where the metal is selected from the group consisting of aluminum, titanium, vanadium, chromium, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, indium, tin, hafnium, tantalum, tungsten, rhenium, osmium, platinum, gold, antimony, beryllium, iridium, silicon, and combinations thereof.
Claim 12
Dependent Claim
11 words
The composite of claim 1 where the metal is conducting alloy.
Claim 13
Dependent Claim
31 words
The composite of claim 11 where the conducting alloy is selected from the group consisting of constantan, hastelloy, nichrome, inconel, monel, carpenter's metal, stainless steels, other steels, and other iron alloys.
Claim 14
Dependent Claim
13 words
The composite of claim 12 where the conducting alloy is a stainless steel.
Claim 15
Dependent Claim
30 words
An electrode comprising a composite bonded to an electrically conducting material, where the composite comprises a matrix consisting essentially of carbon fibers interlocked in a network of fused metal fibers.
Claim 16
Dependent Claim
30 words
An electrode comprising a composite bonded to an electrically conducting material, where the composite comprises a matrix consisting essentially of carbon fibers interlocked in a network of fused metal fibers.
Claim 17
Dependent Claim
20 words
The electrode of claim 14 where the composite contains from about 1 to about 98% by weight of carbon fibers.
Claim 18
Dependent Claim
20 words
The electrode of claim 14 where the carbon fibers have a diameter from about 20 nm to about 1 mm.
Claim 19
Dependent Claim
22 words
The electrode of claim 14 further characterized in having a surface area from about 0.001 to about 1350 square meters per gram.
Claim 20
Dependent Claim
22 words
The electrode of claim 14 where the carbon fibers have a surface area between 1 and about 1500 square meters per gram.
Claim 21
Dependent Claim
22 words
The electrode of claim 18 where the carbon fibers have a surface area between about 50 and 1350 square meters per gram.
Claim 22
Dependent Claim
23 words
The electrode of claim 19 where the carbon fibers have a surface area between about 250 and about 1000 square meters per gram.
Claim 23
Dependent Claim
19 words
The electrode of claim 14 where the metal fibers have a diameter from about 1 to about 14 microns.
Claim 24
Dependent Claim
13 words
The electrode of claim 14 containing from about 20 to about 98% carbon.
Claim 25
Dependent Claim
48 words
The electrode of claim 14 where the metal is selected from the group consisting of aluminum, titanium, vanadium, chromium, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, indium, tin, hafnium, tantalum, tungsten, rhenium, osmium, platinum, gold, antimony, beryllium, iridium, silicon, and combinations thereof.
Claim 26
Dependent Claim
12 words
The electrode of claim 14 where the metal is a conducting alloy.
Claim 27
Dependent Claim
31 words
The electrode of claim 14 where the conducting alloy is selected from the group consisting of constantan, hastelloy, nichrome, inconel, monel, carpenter's metal, stainless steels, other steels, and other iron alloys.
Claim 28
Dependent Claim
13 words
The electrode of claim 25 where the conducting alloy is a stainless steel.
Claim 29
Dependent Claim
25 words
The electrode of claim 14 where the electrically conducting material is a second metal and the composite is bonded to said second metal by sintering.
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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) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |