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Ultra low friction carbon/carbon composites for extreme temperature applications

United States Patent

6,255,234
July 3, 2001
View the Complete Patent at the US Patent & Trademark Office
Argonne National Laboratory - Visit the Technology Development and Commercialization Website
A carbon/carbon composite in which a carbon matrix containing a controlled amount of boron or a boron compound is reinforced with carbon fiber exhibits a low coefficient of friction, i.e., on the order of 0.04 to 0.1 at temperatures up to 600.degree. C., which is one of the lowest frictional coefficients for any type of carbonaceous material, including graphite, glassy carbon, diamond, diamond-like carbon and other forms of carbon material. The high degree of slipperiness of the carbon composite renders it particularly adapted for limiting friction and wear at elevated temperatures such as in seals, bearings, shafts, and flexible joints
Erdemir; Ali (Naperville, IL), Busch; Donald E. (Hinsdale, IL), Fenske; George R. (Downers Grove, IL), Lee; Sam (Gardena, CA), Shepherd; Gary (Los Alamitos, CA), Pruett; Gary J. (Cypress, CA)
Hitco Carbon Composites, Inc. (Gardena, CA), The University of Chicago (Chicago, IL)
09/ 213,551
December 17, 1998
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. W-31-109-ENG-38 between the U.S. Department of Energy and The University of Chicago representing Argonne National Laboratory.