Other

Starfire Systems, Inc.

Carbon Ceramics Company, LLC

Christopher K Whitmarsh

Qionghua Shen

Walter J Sherwood, Jr

A process for forming a new group of siloxane-based compositions by a one-step co-hydrolysis and the compositions formed thereof. The siloxane-based compositions being functionalized with a carbon-carbon double (C&#x2550;C) bond and a silicon-hydrogen (Si&#x2014;H) bond. The C&#x2550;C bond and hydrogen (H) each being attached directly to a silicon (Si) atom of the silicon-oxygen (Si&#x2014;O) backbone of the siloxane-based composition. The C&#x2550;C bond may be from a vinyl or an aromatic radical like a phenyl substituent. The C&#x2550;C bond substituent provides the functionality needed for forming crosslinkages through standard dehydrocoupling catalysts without the need for siloxane fluids or organic compounds containing alkyl or aryl functional groups. The process provides for varying proportions of silanes as starting monomers to tailor the desired silicon, carbon, hydrogen and oxygen ratios in the siloxane-based compositions or resins. The siloxane-based compositions may be used as precursors or replacement resins in the fabrication of other materials.

Process for preparing siloxane-based compositions and derivative compositions thereof

A defect-free vitreous carbon material having a three-dimensional (x,y,z) size in which each of the x, y and z dimensions exceeds twelve millimeters. A process of making such vitreous carbon material employs a three-dimensional fiber mesh that vaporizes at elevated temperature, in which the mesh is impregnated with a polymerizable resin and thereafter the resin is cured. During the initial stage(s) of pyrolysis, the mesh volatilizes to yield a residual network of passages in the cured resin body that thereafter allows gases to escape during pyrolysis of the cured resin material to form the vitreous carbon product. As a result, it is possible to form defect-free vitreous carbon material of large size, suitable for use in structural composites, and product articles such as sealing members, brake linings, electric motor brushes, and bearing members.

Vitreous carbon material and process for making the same

A biphasic nanoporous vitreous carbon material with a cementitious morphology characterized by presence of non-round porosity, having superior hardness and tribological properties, as useful for high wear-force applications. The biphasic nanoporous vitreous carbon material is produced by firing, under inert atmosphere, of particulate vitrified carbon in a composition containing (i) a precursor resin that is curable and pyrolyzable to form vitreous carbon and, optionally, (ii) addition of one or more of the following: solid lubricant, such as graphite, boron nitride, or molybdenum disulfide; a heat-resistant fiber reinforcement, such as copper, bronze, iron alloy, graphite, alumina, silica, or silicon carbide; or one or more substances to improve electrical conductivity, such as dendritic copper powder, copper 'felt' or graphite flake, to produce a superior vitreous carbon that is useful alone or as a continuous phase in reinforced composites, in relation to conventional glassy carbon materials.

Growing community of inventors

Niskayuna, NY, United States of America

Christopher K Whitmarsh