Abstract:
Disclosed is a method for coating electrical contacts (1) in order to protect the same from environmental factors such as corrosion, wear, or dirt while maintaining the electrical conductivity thereof. According to said method, a multilayer or an electrically conductive layer having a chemically functional surface is applied to the contact (1).
Abstract:
The invention relates to methods for producing a coating by spraying a molten material and can be used for different branches of chemistry, machine building, power engineering and metallurgy. The inventive composite coating can be used in the form of a substrate for applying various coatings, for example polymer coatings and for impregnation with various compounds including catalytic compounds. The aim of said invention is making it possible to produce a coating which has higher technical and operation characteristics such as adhesive strength and a free surface value than the actually known technical level, thereby making it possible to produce a coating having a higher quality and reliability. For this purpose, a composite powder provided with a hydrotalcite-type coating is added to the coating composition as a material ensuring the development of the coating microstructure. The qualitative and quantitative composition of the compound is also disclosed. Said coating is deposed to a metal or ceramic substrate, mechanically processed and afterwards is heat-treated by sintering. A method for heat-treating and the operation modes thereof are also disclosed.
Abstract:
Coatings, particularly thin films, of polymeric material are produced in accordance with the invention by applying a finely divided aerosol (N) of polymer solution to a substrate (30) and substantially simultaneously applying an energy source (38) to the applied solution to apply the solution. In cases where the polymer is cross-linking, the energy source assists in cross-linking of the polymer. The preferred energy source is a flame (38) that may optionally or desirably deposit material along with the polymer spray. One particular aspect of the invention is directed to production of polyimide films. In accordance with another aspect of the invention, the co-deposition process is used to provide thin polysiloxane coatings on glass and other substrates.
Abstract:
A method for chemical vapor deposition using a very fine atomization or vaporization of a reagent containing liquid (T) or liquid-like fluid (T) near its supercritical temperature, where the resulting atomized or vaporized solution (N) is entered into a flame or a plasma torch (170), and a powder is formed or a coating is deposited onto a substrate (190). The combustion flame (170) can be stable from 10 torr to multiple atmospheres, and provides the energetic environment in which the reagent contained within the fluid (T) can be reacted to form the desired powder or coating material on a substrate (190). The plasma torch likewise produces the required energy environment, but, unlike the flame, no oxidizer is needed so materials stable in only very low oxygen partial pressures can be formed. Using either the plasma torch or the combustion flame (170), coatings can be deposited and powders formed in the open atmosphere without the necessity of a reaction chamber, but a chamber may be used for various reasons including process separation from the environment and pressure regulation.
Abstract:
A method of applying a wear-resistant coating to aluminum sliding contact wear surfaces is disclosed. The method includes providing a plurality of parts having sliding contact wear surfaces and thermal spray coating at least one of a composite aluminum oxide and PTFE or a blend of aluminum oxide and PTFE. The disclosed method may be used to repair aluminum parts subject to sliding contact wear as well as in the design of new aluminum parts subject to sliding contact wear. Improved compressor bleed valves for gas turbine engines and improved fan exit case assemblies are also disclosed.
Abstract:
Disclosed is a process for applying an insulative coating to a mandrel used in an electromagnetic telemetry antenna assembly. One process includes applying a bond coat to at least a portion of an outer radial surface of a mandrel; applying an electrical isolation layer to the bond coat; applying a first sealant layer to the electrical isolation layer; and heat treating the mandrel in an oven.
Abstract:
El método comprende: La introducción en un conducto de un dispositivo consistente en un vehículo (1) provisto de medios de rodadura, portador de los medios de proyección térmica, La introducción de conducciones eléctricas, neumáticas y/o hidráulicas de, así como de alimentación del metal a proyecta térmicamente; La colocación del dispositivo regenerador mediante arrastre teledirigido en una posición determinada a regenerar; yLa proyección térmica de metal; El avance hasta una nueva posición. El dispositivo está formado por: Un vehículo teledirigido (1), portador del dispositivo de proyección térmica de metales (4), Un cabezal de proyección térmica (4) dispuesto en el vehículo, susceptible de ser posicionado y orientado adecuadamente; Conexiones eléctricas, neumáticas, y/o hidráulicas de alimentación, control y maniobra del vehículo (1) y del dispositivo de proyección térmica (4).
Abstract:
Procédé d'inhibition du dépôt sur une surface métallique de produits issus de la dégradation thermique d'hydrocarbures, selon lequel on réalise le dépôt, sur ladite surface, d'un revêtement polymère à base de fluorure de polyvinylidène, caractérisé en ce que : ledit revêtement est constitué par un mélange d'un homopolymère de fluorure de polyvinylidène, ou d'un copolymère de fluorure de polyvinylidène les autres composants étant présents à raison de 1 à 20 % en poids du polymère, et d'un verre ; ledit revêtement est obtenu à partir d'un mélange de particules de polymère ayant un index de débit de 10 à 300 grammes par 10 minutes déterminé selon la norme ASTM D1238 condition J et de particules de verre sphériques ou ovoïdes de taille comprise entre 1 et 300 μm ; le rapport entre les pourcentages massiques du verre et du polymère est compris entre 0,05 et 0,50 ; le revêtement est obtenu par un procédé à lit fluidisé, ou par un procédé électrostatique, ou par air comprimé, ou par vaporisation de flamme, ou par lit fluide électrostatique. Pièce métallique ainsi revêtue, telle qu'un injecteur pour moteur.
Abstract:
The invention relates to a composite material comprising a material to be coated and a coating agent applied to the surface of the material to be coated to form a coating on it. According to the invention, the coating agent of the composite material is a polymer composite material formed from at least one polymer and a filler, which have been melt-mixed together in a desired mixture ratio and the melt mass thus formed has been extruded into a desired form, and the extruded polymer composite material has been thermally sprayed onto the material to be coated to form a coating on it.