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4358046 Oriented graphite layer and formation
New Patents
111
4357286
FOOD OF ~NG GLASS COMPOSITE
A GaryLASER MIRROR
Robert K Stalcup, Karl Prewo, assigned to United Technologies Corporation
Method of and apparatus for exchanging heat between two fluids wherein a core member is composed essentially of vermicular expanded graphite which has been compressed primarily along one axis and heat is exchanged in the core member between the two fluids along an axis normal to the primary axis of compassion of the core member.
A laser rnirmr stable at high and low temperatures is described comprising graphite fibers in a glass matrix. The mirror is made by hot pressing a graphite fiber lay-up in a glass matrix in a die having a highly polished mirror replicating surface, the fibers laid up in such a way to produce a central plane of symmetry across the central plane of the composite. In use, the composite requires a separate laser reflecting surface layer. The resulting laser mirror has a low density but no porosity, high elastic stiffness, high strength, high fracture toughness, low thermal expansion, high thermal conductivity and environmental stability.
4356158 PROCESS FOR PRODUCING CARBON FIBERS
4358046
Toshikatsu Ishikawa, Haruo Teranishi, Akira Yokoyama, Tetsuo Yanagi, Hirofumi Harada, Tokyo, Japan assigned to Nippon Carbon Co Ltd
Clifford Detz, John B Lightstone, assigned to Union Carbide Corporation
process for producing carbon fibers from various kinds of pitches wherein the calorific values of the pitches are measured and the pitches thereafter subjected to a suitable procedure for producing carbon fibers therefrom depending on their measured calorific value.
An oriented graphite layer is formed on a metallic substrate by providing a coating of particulate carbon thereon, heating the coated substrate in a non-reactive atmosphere to a tem~rature of between 800 degrees and 1350 degrees C. for saturational
A
iv
New Patents
diffusion of carbon into the substrate and cooling to a temperature below about 200 degees C., thereby providing a precipitated oriented graphite film at the surface of the substrate. The substrate may be formed by covering a copper or copper alloy member with a continuous layer of nickel, cobalt, nickel alloy or cobalt alloy. in another embodiment, the substrate with an attached graphite coating is spirally bonded onto a copper tube for use in the field of condensation heat transfer.
coating when applied to a coating of a carboxy1 containing resin such as polyacrylic acid since it reduces the cross-link density. Furthermore, the presence of lithium provides a glass-like substance during combustion which holds the fiber together resulting in slow, even combustion with much reduced evolution of conductive fragments. The coated fibers are utilized as fiber reinforcement for composites.
4360417 4358506 METAL AND CARBON COMPOSITES THEREOF Josef Intrater, Gene Bertaldo As an article for manufacture, a tin, lead, indium, alloys of each with a carbide or carbony1 former in an admixture for forming said tin, lead and indium, wettable graphite composites which will not dewet upon heating; methods for preparing the composites of various shapes, layers, coatings, and sandwiches, of alloys, preforms and metalgraphite etc, structures are also disclosed.
4359503 ~~D~L~~E~MONOVALENT METAL COATING FOR COON-Gael FlBERs
DIMENSIONALLY STABLE HIGH SURFACE AREA ANODE COMPRISING GRAPHITIC CARBON FIBERS Ari Reger, B Sheldon Sprague, assigned to Celanese Corporation
A relatively high surface area electrode is provided which can be utilized as an anode for extended periods of time without replacement in an electrolytic reaction in which oxygen is evolved. The anode of the present invention comprises a carbonaceous fibrous material (e.g. a fabric, tow, or felt) which bears a surface coating of a mixed crystal material consisting essentially of ruthenium oxide and titanium oxide. The anode is particuIar1y suited for usage in the removal of harmful contaminants (i.e. organic or inorganic contaminants) from waste streams even when present in relatively low concentrations .
Jan Harper-Tervet, Fred W Tervet, Marshall F Hump~ey, assigned to The United States of America as represented by the Administrator of the National Aeronautics and Space Ad~nistration
An improved coating of gasi~cation catalyst for carbon-graphite fibers is provided comprising a mixture of a polyvalent metal such as catcium and a monovalent metal such as lithium. The addition of lithium provides a lighter coating and a more flexible
COMPOSITIONS OF AROMATIC ~L~~~TO~~GL~ AND/OR CARBON FIBRES Clive P Smith, ~eath~pstead, United Kingdom assigned to Imperial Chemical Industries Limited
111
4357286
FOOD OF ~NG GLASS COMPOSITE
A GaryLASER MIRROR
Robert K Stalcup, Karl Prewo, assigned to United Technologies Corporation
Method of and apparatus for exchanging heat between two fluids wherein a core member is composed essentially of vermicular expanded graphite which has been compressed primarily along one axis and heat is exchanged in the core member between the two fluids along an axis normal to the primary axis of compassion of the core member.
A laser rnirmr stable at high and low temperatures is described comprising graphite fibers in a glass matrix. The mirror is made by hot pressing a graphite fiber lay-up in a glass matrix in a die having a highly polished mirror replicating surface, the fibers laid up in such a way to produce a central plane of symmetry across the central plane of the composite. In use, the composite requires a separate laser reflecting surface layer. The resulting laser mirror has a low density but no porosity, high elastic stiffness, high strength, high fracture toughness, low thermal expansion, high thermal conductivity and environmental stability.
4356158 PROCESS FOR PRODUCING CARBON FIBERS
4358046
Toshikatsu Ishikawa, Haruo Teranishi, Akira Yokoyama, Tetsuo Yanagi, Hirofumi Harada, Tokyo, Japan assigned to Nippon Carbon Co Ltd
Clifford Detz, John B Lightstone, assigned to Union Carbide Corporation
process for producing carbon fibers from various kinds of pitches wherein the calorific values of the pitches are measured and the pitches thereafter subjected to a suitable procedure for producing carbon fibers therefrom depending on their measured calorific value.
An oriented graphite layer is formed on a metallic substrate by providing a coating of particulate carbon thereon, heating the coated substrate in a non-reactive atmosphere to a tem~rature of between 800 degrees and 1350 degrees C. for saturational
A
iv
New Patents
diffusion of carbon into the substrate and cooling to a temperature below about 200 degees C., thereby providing a precipitated oriented graphite film at the surface of the substrate. The substrate may be formed by covering a copper or copper alloy member with a continuous layer of nickel, cobalt, nickel alloy or cobalt alloy. in another embodiment, the substrate with an attached graphite coating is spirally bonded onto a copper tube for use in the field of condensation heat transfer.
coating when applied to a coating of a carboxy1 containing resin such as polyacrylic acid since it reduces the cross-link density. Furthermore, the presence of lithium provides a glass-like substance during combustion which holds the fiber together resulting in slow, even combustion with much reduced evolution of conductive fragments. The coated fibers are utilized as fiber reinforcement for composites.
4360417 4358506 METAL AND CARBON COMPOSITES THEREOF Josef Intrater, Gene Bertaldo As an article for manufacture, a tin, lead, indium, alloys of each with a carbide or carbony1 former in an admixture for forming said tin, lead and indium, wettable graphite composites which will not dewet upon heating; methods for preparing the composites of various shapes, layers, coatings, and sandwiches, of alloys, preforms and metalgraphite etc, structures are also disclosed.
4359503 ~~D~L~~E~MONOVALENT METAL COATING FOR COON-Gael FlBERs
DIMENSIONALLY STABLE HIGH SURFACE AREA ANODE COMPRISING GRAPHITIC CARBON FIBERS Ari Reger, B Sheldon Sprague, assigned to Celanese Corporation
A relatively high surface area electrode is provided which can be utilized as an anode for extended periods of time without replacement in an electrolytic reaction in which oxygen is evolved. The anode of the present invention comprises a carbonaceous fibrous material (e.g. a fabric, tow, or felt) which bears a surface coating of a mixed crystal material consisting essentially of ruthenium oxide and titanium oxide. The anode is particuIar1y suited for usage in the removal of harmful contaminants (i.e. organic or inorganic contaminants) from waste streams even when present in relatively low concentrations .
Jan Harper-Tervet, Fred W Tervet, Marshall F Hump~ey, assigned to The United States of America as represented by the Administrator of the National Aeronautics and Space Ad~nistration
An improved coating of gasi~cation catalyst for carbon-graphite fibers is provided comprising a mixture of a polyvalent metal such as catcium and a monovalent metal such as lithium. The addition of lithium provides a lighter coating and a more flexible
COMPOSITIONS OF AROMATIC ~L~~~TO~~GL~ AND/OR CARBON FIBRES Clive P Smith, ~eath~pstead, United Kingdom assigned to Imperial Chemical Industries Limited