Donald E Busch

US Patent:

62552341, Jul 3, 2001

Filed:

Dec 17, 1998

Appl. No.:

9/213551

Inventors:

Ali Erdemir - Naperville IL
Donald E. Busch - Hinsdale IL
George R. Fenske - Downers Grove IL
Sam Lee - Gardena CA
Gary Shepherd - Los Alamitos CA
Gary J. Pruett - Cypress CA

Assignee:

Hitco Carbon Composites, Inc. - Gardena CA
The University of Chicago - Chicago IL

International Classification:

B32B 2704

US Classification:

442 97

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.

US Patent:

48834971, Nov 28, 1989

Filed:

Mar 28, 1988

Appl. No.:

7/174146

Inventors:

Terry D. Claar - Tisle IL
Donald E. Busch - Hinsdale IL
John J. Picciolo - Lockport IL

Assignee:

Arch Development Corporation - Chicago IL

International Classification:

H01M 810

US Classification:

296235

Abstract:

To reduce thermal stress and improve bonding in a high temperature monolithic solid oxide fuel cell (SOFC), intermediate layers are provided between the SOFC's electrodes and electrolyte which are of different compositions. The intermediate layers are comprised of a blend of some of the materials used in the electrode and electrolyte compositions. Particle size is controlled to reduce problems involving differential shrinkage rates of the various layers when the entire structure is fired at a single temperature, while pore formers are provided in the electrolyte layers to be removed during firing for the formation of desired pores in the electrode layers. Each layer includes a binder in the form of a thermosetting acrylic which during initial processing is cured to provide a self-supporting structure with the ceramic components in the green state. A self-supporting corrugated structure is thus formed prior to firing, which the organic components of the binder and plasticizer removed during firing to provide a high strength, high temperature resistant ceramic structure of low weight and density.