Abstract: An on-board reductant delivery system for a motor vehicle includes a mixer/nozzle system for connection to an exhaust system of a motor vehicle. The on-board reductant delivery system also includes a fluid metering system connected to the mixer/nozzle system for metering reductants to the mixer/nozzle system. The on-board reductant delivery system further includes an air supply system connected to the mixer/nozzle system for delivering pressurized air to the mixer/nozzle system. The mixer/nozzle system mixes the reductants and pressurized air and sprays the mixture in the exhaust system of the motor vehicle to reduce NOx.

Abstract: A method for providing a diamond film on a scribing wheel useful for scribing glassy materials in order to increase its wear resistance. The method comprises sequential steps which include pre-treating the surface of the scribing wheel and thereafter depositing the diamond film on the pretreated scribing wheel by a chemical vapor deposition process.

Abstract: The electrochemical method of this invention allows deposition of an electrically conductive trans-polyacetylene film on a substrate from a solution comprising substantially dehydrated ethyl alcohol.

Abstract: This invention is directed to a method for enhancing the diamond nucleation on a substrate prior to providing a diamond film thereon. More particularly, it is directed to a method which involved ultrasonic treatment of the substrate surface with a fluid consisting essentially of unsaturated oxygen-free hydrocarbons and diamond grit.

Abstract: Provided is a method and apparatus for in-situ measuring filament temperature and the thickness of a film deposited on a substrate disposed within a hot-filament chemical vapor deposition reactor. In accordance with the invention, white light which is emitted directly from the filament and that reflects from the top and bottom surfaces of a deposited film are collected and converted to monochromatic light through the use of simple narrow-banned interference filters operative over specific, yet different, optical banned widths. This information is thereafter used to mathematically calculate the filament temperature, film thickness and growth rate of the deposited film.

Abstract: A method of growing high purity diamond crystallite structures at relatively high growth rates on a temperature resistant substrate, comprising (a) flowing diamond producing feed gases at low pressure through a reaction chamber containing the substrate, the feed gases being comprised of hydrocarbon devoid of methyl group gases, i.e., acetylene or ethylene, diluted by hydrogen, and (b) while concurrently raising the temperature of the substrate to the temperature range of 600.degree.-1000.degree. C., thermally activating the feed gases by use of a hot filament located within the chamber and upstream and adjacent the substrate, the filament being heated to a temperature above 1900.degree. C., that is effective to generate a substantial atomic hydrogen (H) concentration and carbon containing free radicals. A substantial additional loss in carbon balance of the gases is triggered at a lower filament temperature indicative of the formation of intermediate substances that stimulate diamond growth.

Abstract: Method of fabricating free-standing diamond films by depositing and adhering polycrystalline diamond by hot filament chemical vapor deposition (1-100 Torr, filament temperature equal to or greater than 1900.degree. C., substrate temperature of 650.degree.-950.degree. C.) onto a substrate meltable at a temperature slightly in excess of the deposition temperature; and (b) prior to cooling said polycrystalline diamond particles, increasing (50.degree.-300.degree. C.) the substrate temperature to melt at least a portion thereof while permitting such melt to emigrate from the diamond films.

Abstract: This specification discloses a process for treatment of exhaust gases from an internal combustion engine. The process has the following general steps. A hydrocarbon fuel is burned in an internal combustion engine to generate exhaust gases containing various amounts of hydrocarbons, carbon monoxide, and oxides of nitrogen. The generated exhaust gases are passed over an improved catalyst system characterized as follows. The catalyst system has a support medium for supporting the same. The support medium has both an upstream support portion over which exhaust gases initially flow and a downstream support portion over which exhaust gases flow after passing over the upstream support portion thereof. Finely divided palladium is dispersed by itself on the upstream support portion of the support medium. The downstream support portion of the support medium has a platinum/rhodium three-way catalyst thereon.