Method for making open-mesh carbon-fiber-reinforced carbon composite material

• US 5,851,588 A
• Filed: 11/21/1996
• Issued: 12/22/1998
• Est. Priority Date: 11/21/1996
• Status: Expired due to Term

• Current Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: Uthoff, Loren H. Jr.
• Primary Examiner(s): PIANALTO, BERNARD D
• Application Number:
  US08/754,573
• Time in Patent Office: 761 Days
• Field of Search: 427/228, 427/236, 427/372.2, 427/428, 427/427, 427/443.2
• US Class Current: 427/228
• CPC Class Codes: C04B 35/52 based on carbon, e.g. graphite
• CPC Class Codes: C04B 41/009 characterised by the material treated
• CPC Class Codes: C04B 41/4554 the coating or impregnating material being an organic or organo-metallic precursor of an inorganic material
• CPC Class Codes: C04B 41/4582 Porous coatings, e.g. coating containing porous fillers
• CPC Class Codes: C04B 41/5001 with carbon or carbonisable materials
• CPC Class Codes: C04B 41/85 with inorganic materials

Abstract

A method for making a carbon composite material includes coating a carbon-fiber meshed cloth substrate with a liquid form of a carbon source and carbonizing the coating on the coated substrate by heating the coated substrate to a carbonizing temperature. The thickness of the coating on the substrate is such that, upon carbonization of the coating, the carbonized coated substrate retains porosity and a discernible surface texture.

Claims

1. A method for making an open-mesh carbon-fiber-reinforced carbon composite material formed substantially of carbon, the method comprising the steps of:

coating a carbon-fiber meshed cloth substrate with a liquid form of a carbon source, the thickness of the coating being such that, upon carbonization of the coating, the carbonized coated cloth substrate retains porosity, is open-mesh having through pores, and is light-pervious; and

carbonizing the coating on the coated cloth substrate by heating the coated cloth substrate to a carbonizing temperature so that an open-mesh, light-pervious carbon-fiber-reinforced carbon composite material having through pores and formed substantially of carbon is formed.

2. The method according to claim 1, wherein the coating step is accomplished by a technique selected from the group consisting of dipping, roll coating, and spraying.

3. The method according to claim 1, wherein the carbon source is selected from the group consisting of thermoplastic resins and thermoset resins.

4. The method according to claim 1, wherein the carbon source is selected from the group consisting of pitches, phenol resin, and furan resin.

5. The method according to claim 1, further comprising forming the liquid form of the carbon source, the forming being accomplished by a technique selected from the group consisting of (i) admixing a liquid diluent to the carbon source and (ii) melting the carbon source.

6. The method according to claim 1, further comprising admixing a liquid diluent to the carbon source prior to the coating step and drying the coated cloth substrate after the coating step but before the carbonizing step to remove at least some of the liquid diluent from the coated cloth substrate, the drying being performed at a temperature of from greater than 25°

C. to less than 600°

C.

7. The method according to claim 1, wherein the carbonizing temperature is from about 600°

C. to about 2500°

C.

8. The method according to claim 1, wherein the cloth substrate is coated and carbonized as a single layer, thereby forming a single layer open-mesh carbon-fiber-reinforced carbon composite material.

9. The method according to claim 1, wherein the cloth substrate has a discernible surface texture and the open-mesh carbon-fiber-reinforced carbon composite material has a discernible surface texture similar to the texture of the cloth substrate.

10. A method for making an open-mesh carbon-fiber-reinforced carbon composite material formed substantially of carbon, the method comprising the steps of:

forming a liquid form of a carbon source by a technique selected from the group consisting of (i) admixing a liquid diluent to the carbon source and (ii) melting the carbon source;

coating a single layer carbon-fiber meshed cloth substrate in the form of a flexible woven fabric with the liquid form of the carbon source, the thickness of the coating being such that, upon carbonization of the coating, the carbonized coated cloth substrate retains porosity, is open-mesh having through pores and is light-pervious; and

carbonizing the coating on the coated cloth substrate by heating the coated cloth substrate to a carbonizing temperature of from about 600°

C. to about 2500°

C. so that a flexible open-mesh light-pervious carbon-fiber-reinforced carbon composite material having through pores and formed substantially of carbon is formed.

11. The method according to claim 10, wherein the coating step is accomplished by a technique selected from the group consisting of dipping and spraying.

12. The method according to claim 10, wherein the carbon source is selected from the group consisting of thermoplastic resins and thermoset resins.

13. The method according to claim 10, wherein the carbon source is selected from the group consisting of pitches, phenol resin, and furan resin.

14. The method according to claim 10, when forming a liquid form of a carbon source is accomplished by admixing a liquid diluent to a carbon source, the method further comprises drying the coated cloth substrate after the coating step but before the carbonizing step to remove at least some of the liquid diluent from the coated cloth substrate, the drying being performed at a temperature of from greater than 25°

C. to less than 600°

C.

15. The method according to claim 10, wherein the cloth substrate is coated and carbonized as a single layer, thereby forming a single layer open-mesh carbon-fiber-reinforced carbon composite material.

16. The method according to claim 10, wherein the cloth substrate has a discernible surface texture and the open-mesh carbon-fiber-reinforced carbon composite material has a discernible surface texture similar to the texture of the cloth substrate.

17. A method for making a single layer open-mesh carbon-fiber-reinforced carbon composite material formed substantially of carbon, the method comprising the steps of:

forming a liquid form of a carbon source selected from the group consisting of thermoplastic resins and thermoset resins, the forming being accomplished by a technique selected from the group consisting of (i) admixing a liquid diluent to the carbon source and (ii) melting the carbon source;

coating a single layer carbon-fiber meshed cloth substrate in the form of a flexible woven fabric with the liquid form of the carbon source, the cloth substrate having a discernible surface texture and the thickness of the coating being such that, upon carbonization of the coating, the carbonized coated cloth substrate retains porosity and a discernible surface texture similar to that of the cloth substrate and is open-mesh and light-pervious having through-pores; and

carbonizing the coating on the coated cloth substrate by heating the coated cloth substrate to a carbonizing temperature of from about 600°

C. to about 2500°

C. so that a flexible, light-pervious single layer open-mesh carbon-fiber-reinforced carbon composite material having through pores and formed substantially of carbon is formed, the open-mesh carbon-fiber-reinforced carbon composite material having a discernible surface texture similar to that of the cloth substrate.