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US 7,452,389 B2Granted
Carbon foam abrasives
AssigneeTouchstone Research Laboratory, Ltd.
InventorsDarren Kenneth Rogers, Janusz Wladyslaw Plucinski
Life of this patent
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Abstract
The incorporation or blending of from about 1 to about 10% by volume of a “carbide precursor” powder, preferably on the order of <100 microns in size, with a coal particulate starting material and the subsequent production of carbon foam in accordance with the method described herein, results in a carbon foam that exhibits significantly enhanced abrasive characteristics typical of those required in the polishing of, for example glass, in the manufacture of cathode ray tubes.
Claims1
An abrasive carbon foam having an adherent surface comprising:
- an abrasive carbon foam body having a surface, wherein the abrasive carbon foam body is produced by blending particulate coal having a free swell index ranging from about 3.5 to about 5.0 with about 1% to about 10% by volume of a carbide precursor powder to form a reactive blend wherein the carbide precursor is selected from the group consisting of tungsten, silicon, and titanium, and controllably heating said reactive blend in a mold under a non-oxidizing atmosphere to a first temperature ranging from about 300° C. to about 600° C. and soaking at this temperature for a period ranging from about 10 minutes to about 12 hours;
- and
- an epoxy-graphite adhesive on the surface of the abrasive carbon foam body.
Dependencies are inferred from the claim text.