Abstract: A metal is selectively chemically vapor deposited on a substrate through openings in a moisture adsorbing mask layer by maintaining moisture in the mask layer. Thick metal layers are formed by precharging the mask with moisture. Also a cleaned tube is prepared for selective deposition by operating the process with a bare substrate until the tube is coated. The selective deposition is then performed.

Abstract: A method of enhancing the geotechnical properties of soil materials so as to control soil erosion including fugitive dust by treating the soil with a mixture of polyacrylic acids or polyacrylates, a dibasic acid or acid salt and a wetting agent in water utilizes an aqueous solution of a polyacrylate emulsion, (said active polymer having a Mw of 1-5 million), sodium citrate and a surfactant (nonylphenol plus 10 moles ethylene oxide). The mixture is applied directly to the soil to be stabilized in either diluted or undiluted form whereby surface erosion in both quiescent areas and road beds can be controlled.

Abstract: An electronic circuit having an electrically conductive pattern formed on a substrate and having on at least one surface of the substrate a film obtained from a soluble polymerizable oligomer of the formula: ##STR1## wherein M is --C.tbd.C--, --C.tbd.C--C.tbd.C, --O--, ##STR2## wherein R is an alkyl or aromatic group; wherein Ar is an aromatic group; wherein X is an integer greater than two but less than 30, z is either zero or an integer, and y is an integer with the sum of y and z equal to x; and wherein n is an integer from 1 to 10. The substrate is coated by applying the above composition to the substrate and then hardening the composition by further polymerization. Preferred compositions contain the above described oligomer and certain plasticizers and/or toughening agents.

Abstract: A technique and apparatus for homogeneous chemical vapor deposition (HCVD), wherein a heated carrier gas is mixed with a source gas in a location close to a substrate on which deposition is to occur. The heated carrier gas transfers heat to the source gas in order to decompose it, producing the intermediate species necessary for deposition onto the substrate. Thus, the source gas is not subjected to heating above its pyrolysis temperature prior to being transported to the immediate vicinity of the substrate. This HCVD apparatus includes a heat source for heating the carrier gas, a tube for bringing the heated carrier gas to a location close to the substrate, and another tube for bringing the reactive source gas to the aforementioned location where it is mixed with the hot carrier gas to cause decomposition of the source gas close to the substrate. The substrate temperature is decoupled from the hot gas temperature and is significantly colder than the hot gas temperature.

Abstract: Oxide (R.sub.m O.sub.n) films are grown by evaporation from separate sources of element (R) and an oxide (M.sub.r O.sub.s) which serves as the oxygen source. The oxide (M.sub.r O.sub.s) should sublimate congruently; i.e., without decomposing into oxygen and its constituent element (M). On the growth surface this oxide (M.sub.r O.sub.s) can react with the element (R) to form another oxide (R.sub.m O.sub.n) that is thermodynamically more stable:mR+M.sub.r O.sub.s .fwdarw.R.sub.m O.sub.n +M.sub.r O.sub.s-nUsing this technique, films of Al.sub.2 O.sub.3, MgO, SiO.sub.2, and MgAl.sub.2 O.sub.4 have been grown using As.sub.2 O.sub.3 or Sb.sub.2 O.sub.3 as the oxygen source.

Abstract: An optical data storage system is contemplated, employing improved optical disk media, these characterized by multiple layers, including various under layers, an optical absorber layer, and overcoating layers, such as a "soft pad" layer (e.g., a fluoropolymer) overlaid with a "Hard" layer (e.g., a radiation-cured acrylic) as an outer protective overcoat. Taught are "Spiral" coating techniques (FIG. 3) specified for applying the "Hard" layer and preferably involving: applying the coating mix as arcuate "bead segments" about the disk center, these being formulated and applied to properly "set-up" and quickly "level" (e.g., close enough to one another and "self-leveling").

Abstract: A method for effecting repairs of the damaged components of a machinery in he field which would otherwise require high temperature treatment of the damaged components to form a metal-oxide epoxy joint in a shop. The method includes preparing a repair patch which includes a metal sheet with the metal oxide layer thereon, applying a thin high performance protective coating thereover, covering thereof with a sacrificial backing sheet and then curing the adherent-top coat backing sheet to form a highly durable bonded system which can be stored until needed. At the time of repair the backing sheet is removed by sanding or grit blasting and the adherent is applied to the structure to be repaired under ordinary temperature conditions.

Abstract: A metal and an insulator are alternately deposited on a substrate. The alternate deposition is continued until the desired film thickness of the cermet is obtained, at least one of the metal or insulator materials being deposited in sufficiently small quantities so that only a discontinuous film of that material is formed during a deposition. The metal insulator composition of the cermet is controlled by the relative deposition rates of the insulator metal. The metal particle size is controlled by the duration of each metal deposition.

Abstract: A method of forming a coated article is described. The article is composed of a carbon body having a thermochemically deposited coating which renders the body resistant to oxidation at high temperatures. A volatile gaseous halide of silicon is partially reduced to form a lower halide in a first reaction zone having a first pressure and separated from the body. The lower halide is flowed into a second reaction zone maintained at a pressure lower than the pressure in the first reaction zone. A gaseous alloying agent is introduced into the second reaction zone. The agent includes one or more elements selected from the group consisting of carbon, oxygen, aluminum, and nitrogen. As a consequence, a liquid phase intermediate compound is deposited on the substrate body which is thereafter thermochemically reacted to produce a coating of the silicon alloy.

Abstract: In accordance with the invention, a composition of matter is provided for forming a coating for protecting carbonaceous substrates from degradation at elevated temperatures. The composition of matter is a mixture of particulate silicon, silicon carbide and alumina. The mixture contains between about 40% and 50% silicon by weight of the total composition, between about 30% and 50% silicon carbide by weight of the total composition and between about 20% and 30% alumina by weight of the total composition. A method is provided for forming a primary protective coating on carbonaceous substrates utilizing the aforesaid mixture. An enhancement coating is provided for sealing the primary coating in applications where the substrate will be subjected to elevated temperatures and temperature cycling.

Abstract: A process for coating a wide moving web with the product of chemical reactants first brought into contact at a point proximate the glass surface. The process comprises a primary distribution of reactants (across the width of the substrate) through a row of small apertures, then a segregation through a secondary passage to a reaction zone at the surface of the substrate. Reactant distribution pipes are advantageously positioned and shaped to form only a gradual increase in width of the reactant flow path as they enter the reaction zone.

Abstract: Adherent deposits of tungsten are formed on receiving surfaces by preparing the receiving surface and thereafter forming a thin deposit of polycrystalline silicon on the surface. The surface and the deposited polycrystalline silicon is then exposed to a hydrogen containing tungsten fluoride gas at a suitable temperature to induce the adherent growth of tungsten film on the surface by reaction of the silicon with the tungsten fluoride gas. It is possible to form the polycrystalline silicon in a pattern on the surface and to form the tungsten deposit in the pattern in which the polycrystalline silicon had been deposited.

Abstract: A process for preparing a titanium carbide film characterized by vaporizing metallic titanium from a metallic titanium vaporizing source placed in an atmosphere containing a dilute acetylene gas and depositing titanium carbide onto the surface of base set up facing said source.

Abstract: A method of treating a commercially available ion plated graphite/aluminum composite with suitable hydroscopic liquid selected from the group consisting of methylene chloride, toluene, xylene and where such liquid treatment results in capillary action in the graphite fibers and subsequently heat treating the graphite/aluminum composite in a hot processing step where magnesium powder is sublime at a temperature in the range of 350.degree.-450.degree. C. and where such sublime magnesium vapor uniformly coats graphite and aluminum in the composite material so as to obtain a graphite aluminum composite coated with magnesium.

Abstract: A refractory fibrous preform in ceramic material is placed inside an infiltration chamber where it is heated within a reacting gaseous mixture introduced into the chamber and containing at least one gaseous hydrolyzing or oxidizing agent and a volatile hydrolyzable or oxidizable compound of the one element or of each element of which the oxide is a constituent of the matrix of the structure to be produced, in order to obtain by chemical reaction an adhesive deposit of said oxide or oxide constituting said matrix and having a melting point higher than 1750.degree. C.

Abstract: A method for producing thin films of chalcogenides of the rare earths characterized by introducing a rare earth metal vapor into an atmosphere not containing oxygen, but containing a gaseous chalcogen as well as hydrogen, at a total pressure about 1.times.10.sup.-4, giving rise to a reaction which forms a gaseous rare earth chalcogenide. The gaseous rare earth chalcogenide is then deposited as a thin film on a substrate heated to 200.degree. C. to about 400.degree. C.

Abstract: An article comprised of metal directly and adherently bonded onto a ceramic substrate, and a process for producing same, wherein the ceramic is adhesion promoted with molten inorganic compound, treated with compounds that promote adsorption of catalyst for metal deposition, and plated with metal. Uniform surface coverage with catalyst and metal is ensured by the treatment with the adsorption promoters.

Abstract: Electronic packages and the like, particularly finished packages with leaky welds, are hermetically sealed by vapor deposition of a polymer film through a sealable port. A high quality film is obtained by slow deposition of a monomer vapor which subsequently polymerizes. The process is not destructive due to the lack of high temperatures and curing agents. Extremely low permeability for common molecules and for water vapor is achieved by utilizing C-type para-xylylene as the polymer material.

Abstract: The invention provides a method for providing a highly protective coating layer of silicon carbide on to the surface of a substrate. The method comprises pyrolyzing the vapor of an organosilicon compound having at least one hydrogen atom directly bonded to the silicon atom in a molecule but having no halogen or oxygen atom directly bonded to the silicon atom at a temperature of 700.degree. to 1400.degree. C. in contact with the substrate surface to deposit silicon carbide thereon. In particular, the method is useful to form a sheath-and-core structure composed of the core of carbon filament and the coating layer of silicon carbide so that the carbon fibers are imparted with greatly improved resistance against oxidation and chemicals including molten metals when the carbon fibers are used as a reinforcing material of a fiber-reinforced metal composite as well as with improved affinity with molten resins and metals which is also an advantageous property as a reinforcing material for such matrix materials.

Abstract: A method is disclosed of repairing and resurfaced fiberglass boat hulls which have become worn or abraded, by applying an epoxy material to the boat hull, and distributing said epoxy in one manual stroke by means of a template so as to repair the hull, increasing abrasion resistance while not impairing the boat's performance.