Mixed fiber composite structures

• US 5,102,745 A
• Filed: 11/13/1989
• Issued: 04/07/1992
• Est. Priority Date: 11/13/1989
• Status: Expired due to Term

• Current Assignee: Auburn University
• Original Assignee: Auburn University
• Inventors: Tatarchuk, Bruce J., Rose, Millard F., Krishnagopalan, Aravamuthan
• Primary Examiner(s): Zimmerman, John J.
• Application Number:
  US07/435,167
• Time in Patent Office: 876 Days
• Field of Search: 428/605, 428/607, 428/608, 204/11, 204/12, 204/27, 204/28
• US Class Current: 428/605
• CPC Class Codes: B22F 3/002 Manufacture of articles essentially made from metallic fibres
• CPC Class Codes: D04H 1/4209 Inorganic fibres
• CPC Class Codes: D04H 1/4234 Metal fibres
• CPC Class Codes: D04H 1/4242 Carbon fibres
• CPC Class Codes: D04H 1/43835 Mixed fibres, e.g. at least two chemically different fibres or fibre blends
• CPC Class Codes: D04H 1/43838 Ultrafine fibres, e.g. microfibres
• CPC Class Codes: H01G 11/26 characterised by their structure, e.g. multi-layered, porosity or surface features
• CPC Class Codes: H01G 11/58 Liquid electrolytes
• CPC Class Codes: H01G 11/72 specially adapted for integration in multiple or stacked hybrid or EDL capacitors
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y10T 428/12424 Mass of only fibers

Abstract

A family of composites are characterized as a network of a first fiber and at least a second fiber, where at least the first fibers have a multiplicity of bonded junctions at their point of crossing. The largest class has metals as one or both of the fibers, although the second fiber can be of materials such as carbon, ceramics, and high surface area materials. The composites can be simply prepared and manifest enormous variation in such properties as void volume, pore size, and electrical properties generally.

Claims

1. An article comprising a network of a first metal fiber and at least one second fiber, where the second fiber is selected from the group consisting of a ceramic, a high surface area non-metallic material, carbon, or any combination thereof, where at least said first metal fiber has a plurality of bonded junctions at the first metal fiber crossing points, and where the second fiber is interlocked in the network of the bonded metal fibers.

2. The article of claim 1 where the second fiber is a ceramic selected from the group consisting of the oxides, carbides, and nitrides 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, berrylium, iridium, silicon, magnesium, manganese, and gallium and mixtures thereof.

3. The article of claim 1 where the first fiber is a metal, or any combination of metals, 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, magnesium, manganese, gallium, and their alloys.

4. The article of claim 1 further characterized in having entrapped within the network particles whose size is between about 0.1 to about 5,000 microns and where said particles are impregnated with a metal or metal compound having catalytic properties.

5. The article of claim 1 where the second fiber is a high surface area material with a surface area from 1.5 to about 1500 square meters per gram.

6. The article of claim 5 where the fiber is selected from the group consisting of silica, carbon, magnesia, alumina, titania, aluminosilicates, aluminophosphates, silicaaluminophosphates, and clays.

7. The article of claim 5 where the second fiber has a surface area of at least 50 square meters per gram.

8. The article of claim 5 where at least the second fiber is impregnated with a third metal or a compound thereof, said third metal 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, berrylium, iridium, silicon, magnesium, manganese, and gallium.