James Oscar Gibson
Engineers at El Oro Ln, Pacific Palisades, CA

4278729, Jul 14, 1981

Nov 19, 1979

6/095158

James O. Gibson - Pacific Palisades CA
Mark G. Gibson - Pacific Palisades CA

B32B 900, D02G 300

428368

Carbon fiber reinforced tantalum carbide composites are produced by vacuum infiltration of omni-weave carbon, e. g. three dimensional graphite, yarn preforms with an aqueous saturated solution containing tantalum fluoride and sucrose. Anhydrous ammonia is added under pressure, forming ammonium fluoride, which is removed by vacuum sublimation by application of heat. The resulting preform containing tantalum pentoxide and partially pyrolyzed sucrose is heated at high temperature and reduced pressure to decompose the sucrose to yield active carbon which reacts with the tantalum pentoxide to yield tantalum carbide and carbon monoxide. After repeated multiple infiltrations and processing, a composite is produced having a matrix of tantalum carbide or tantalum carbide and carbon, which is reinforced in three or more directions with high strength-high modulus carbon or graphite yarn, the amount of carbon in the matrix phase being a function of the amount of sucrose present in the aqueous solution of tantalum fluoride.

4196230, Apr 1, 1980

Sep 15, 1978

5/942485

James O. Gibson - Pacific Palisades CA
Mark G. Gibson - Pacific Palisades CA

B05D 302

427228

Carbon fiber reinforced tantalum carbide composites are produced by vacuum infiltration of omni-weave carbon, e. g. three dimensional graphite, yarn preforms with an aqueous saturated solution containing tantalum fluoride and sucrose. Anhydrous ammonia is added under pressure, forming ammonium fluoride, which is removed by vacuum sublimation by application of heat. The resulting preform containing tantalum pentoxide and partially pyrolyzed sucrose is heated at high temperature and reduced pressure to decompose the sucrose to yield active carbon which reacts with the tantalum pentoxide to yield tantalum carbide and carbon monoxide. After repeated multiple infiltrations and processing, a composite is produced having a matrix of tantalum carbide or tantalum carbide and carbon, which is reinforced in three or more directions with high strength-high modulus carbon or graphite yarn, the amount of carbon in the matrix phase being a function of the amount of sucrose present in the aqueous solution of tantalum fluoride.

4472367, Sep 18, 1984

Sep 8, 1980

6/184957

James O. Gibson - Pacific Palisades CA
Mark G. Gibson - Pacific Palisades CA

C01B 3130

423439

An apparatus and process are disclosed for utilizing solar radiation and the energy contained therein for the carbothermic reduction of a metal oxide to a metal carbide. The apparatus comprises a reflective surface which collects and focuses solar radiation onto a focal mirror which consequentially reflects and focuses the solar light rays into a reaction chamber through a Fresnel lens and a transparent window provided on the chamber. The solar light rays are focused by the reflective surface focal mirror and Fresnel lens such that the energy absorbed by reactants in the reaction chamber is sufficient for the carbothermic reduction of the metal oxide.

4627418, Dec 9, 1986

Jan 16, 1984

6/570858

James O. Gibson - Pacific Palisades CA
Mark G. Gibson - Pacific Palisades CA

F24J 302

126438

An apparatus and process are disclosed for utilizing solar radiation and the energy contained therein for the carbothermic reduction of a metal oxide to a metal carbide. The apparatus comprises a reflective surface which collects and focuses solar radiation onto a focal mirror which consequentially reflects and focuses the solar light rays into a reaction chamber through a Fresnel lens and a transparent window provided on the chamber. The solar light rays are focused by the reflective surface focal mirror and Fresnel lens such that the energy absorbed by reactants in the reaction chamber is sufficient for the carbothermic reduction of the metal oxide.