Abstract: A sintered composition used as a brush for a dynamo electric machine contains copper, carbon and silicon carbide.

Abstract: A thermionic cathode of tungsten or molybdenum is made with an activating content of lanthanum oxide and is supplied with a carbonaceous reducing agent either by incorporation in the bulk material of the cathode body or by carburizing, so that the reducing agent comprises at least in part a carbide of the carrier metal. Lower operating temperatures and higher emissivity are obtained compared to thoriated tungsten filaments and longer useful life compared to other cathodes activated by other rare earth oxides. The temperature-emissivity characteristics are such that good results are obtainable even within the temperature range in which molybdenum is usable as a carrier material.

Abstract: Copper powder, carbon fibers arranged in random directions and a metal capable of reacting with carbon fibers are homogeneously mixed together, and the mixture is heated and molded under high pressure to form an integral composite. The so formed carbon fiber-copper matrix composite has no directional characteristic in mechanical properties, and the linear thermal expansion coefficient of the composite is low and the thermal stability of the composite is so high that when it is exposed to high temperature, no damage by thermal deformation is caused.

Abstract: Elastic resistor compositions comprising metallic-conductive particles and solid conductive lubricant particles codistributed in a matrix of a curable, elastomer-forming polymer and the cured compositions formed therefrom. Elastic resistors made from said compositions are also disclosed.

Abstract: A novel graphite fiber/metal composite material in which the graphite fibers have an adherent coating of silicon oxide and silicon carbide. The coating protects the graphite surface from attack by carbide forming matrix metals such as aluminum, titanium, magnesium and nickel. In a preferred embodiment of the invention the coating is formed by an intermediate temperature vapor deposition technique involving the reduction of silicon tetrachloride in the presence of hydrogen and an oxygen containing gas.

Abstract: A graphite-base filling material for the decomposition of alkali metal amalgams, said material containing titanium carbide and incorporating the ingredients in an amount between 69 and 35 wt % for the graphite and between 31 and 65 wt % for the titanium carbide.The method of producing the material disclosed consists in that a carbon filler, a carbon-containing binding agent and titanium or titanium carbide or titanium oxide are intermixed. The titanium or said titanium compounds is used in an amount between 24.8 and 52 wt %, the titanium carbide or titanium oxide being taken in terms of titanium. The mixture obtained is moulded and the blanks moulded are fired at a temperature between 500.degree. and 1200.degree. C. Next, the blanks fired are graphitized at a temperature between 1700.degree. and 1800.degree. C.

Abstract: Polycrystalline silicon carbide with increased electrical conductivity at room temperature is produced by shaping a particulate mixture of .beta.-silicon carbide, boron additive, beryllium carbide and a carbonaceous additive into a green body and sintering the body producing a sintered body having a density of at least about 85% of the theoretical density of silicon carbide.

Abstract: High strength shaped carbonaceous articles are prepared by combining particles of carbon, graphite and mixtures thereof that have a predetermined particle size and particle size distribution with resin binder and thereafter shaping and curing the mixture. Typically, the shaped article is pyrolyzed. Additionally, the bulk density of the articles can be increased and the porosity reduced by vapor depositing graphite in the pores of the article.

Abstract: A fluid-permeable electrically energized heat generating member of a desired shape, such as a rectangular brick, is formed by (1) mixing (a) about 87 to 94 percent by weight of a first material which contains about 80 to 95 percent by weight of SiC and about 5 to 20 percent by weight of a mixture of carbonyl iron, nickel-chromium alloy, cobalt and carbon; (b) about 5 to 10 percent by weight of a second material which contains about 75 to 95 percent by weight of an organic binder material, such as a linseed oil and about 5 to 25 percent by weight of a foaming material, such as methylene diphenyl isocyanate; and (c) about 0.

Abstract: Glass powder is wetted with an aqueous solution or emulsion of an organic binder and mixed with carbon black in the form of soot or lampblack. The resulting material is packed between the parts of the central electrode of a sparkplug and fired at a temperature sufficient to fuse the glass to produce a gas-tight seal with electrically conducting properties. Up to 5% of metal powders may be included in the material if it is desired to prevent the resistance from rising during service. Oxides or carbides and certain other metal powders may be added to bring the thermal expansion coefficient to a desired average value.