Patent Number: 6,255,234

Title: Ultra low friction carbon/carbon composites for extreme temperature applications

Abstract: 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

Inventors: 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)

Assignee: Hitco Carbon Composites, Inc.

International Classification: F16C 33/16 (20060101); F16C 33/04 (20060101); F16D 69/02 (20060101); B32B 027/04 ()

Expiration Date: 07/03/2018