Abstract:
Plasma spraying of particulate thermotropic liquid crystalline polymers onto the surfaces (14) of composite and metallic structures. The present plasma spray process employs a conventional direct current electric arc plasma spray gun (12) in which an inert plasma gas is introduced, caused to swirl, and discharges as a rotating plasma flame having an exceptionally high temperature, above about 14000 °K, into which the particulate liquid crystal polymer is discharged for melting and propulsion onto the target surface (14). The target surface (14) preferably is preheated, and the molten particles deposit and cool to form a build up of the desired thickness. Cooling is regulated by post-heating the deposit to a temperature between about 200 °F and 500 °F.
Abstract:
An improved chemical vapor deposition apparatus and procedure is disclosed. The technique provides improved shielding of the reaction and deposition zones (26, 28) involved in providing CVD coatings by establishing a barrier zone (30) wherein gases flowing from a reaction zone (26) and deposition zone (28) to the ambient atmosphere are made to flow at a velocity of at least 15.24 m/min. Coatings can thus be produced, at atmospheric pressure, of materials which are sensitive to components in the atmosphere on substrates which are sensitive to high temperatures and which are too large, or inconvenient, to process in vacuum or similar chambers. The improved technique can be used with various energy sources and is particularly compatible with Combustion Chemical Vapor Deposition (CCVD) techniques.
Abstract:
Bei einem Verfahren zum Pulverbeschichten von hochtemperaturbeständigen Oberflächen (1) mit mehrschichtigen Überzügen aus insbesondere Fluorkunststoffen lassen sich dicke Beschichtungen (2) erreichen, wenn beim Auftragen einer Folgeschicht (4) das Fließvermögen der zuvor aufgebrachten Schicht (3) unterhalb der Abfließgrenze gehalten wird.
Abstract:
Ce procédé comprend les étapes suivantes : - amenée d'au moins un gaz combustible à travers une torche (22) pour engendrer une flamme (24) à la sortie de la torche (22); - disposition d'un substrat (90) en regard et à l'écart de la sortie de la torche (22), la flamme (24) entrant en contact avec le substrat (90); - injection d'un matériau dispersé dans la flamme (24); - croissance de nanostructures dans la flamme (24). Le matériau dispersé est formé de particules solides contenant de l'oxygène, au moins une partie des nanostructures formées dans la flamme (24) étant greffées à la surface des particules.
Abstract:
The present invention relates to a method for producing a superamphiphobic coating on a substrate, said method comprising the steps of a) providing a substrate, b) generating a plasma in a treatment space, under atmospheric pressure, using a dielectric barrier discharge, by supplying a plasma gas (6) between at least a first and a second electrode (2 and 3) connected to alternating current (AC) power means (7), said electrodes (2 and 3) defining said treatment space (5), c) introducing into said plasma a coating forming material selected from the group consisting in fluoro-acrylate monomers, fluoro-alkyl acrylatemonomers,fluoro-methacrylate monomers, fluoro-alkyl methacrylatemonomers, fluroro-silane, monomers or a combination thereof, d) exposing at least a part of the surface of said substrate to said plasma comprising said coating forming material in multiple successive passes within said treatment space by moving said substrate, said at least first and/or second electrode (2, 3), or both, without stopping, from one pass to another, the generation of the plasma and said introduction of said coating forming material into said plasma.
Abstract:
Provided herein are nanoparticulate coated structures and methods of making structures. The structures comprise a support element, a nanoparticulate layer, and a binder disposed on the support element, wherein the binder comprises an alkali silicate or borate. In addition, methods of making the structures and uses of the described structures are described herein.
Abstract:
Provided herein are nanoparticulate coated structures and methods of making structures. The structures comprise a support element, a nanoparticulate layer, and a binder disposed on the support element, wherein the binder comprises an alkali silicate or borate. In addition, methods of making the structures and uses of the described structures are described herein.
Abstract:
The present invention is related to a method for producing a biocidal coating on a substrate, by a flame assisted chemical vapour deposition and a plasma assisted chemical vapour deposition step. In a first step, a biocial material is deposited onto the substrate, possibly in combination with a first coating forming material. The second step provides a coating forming material onto the first layer, possibly in combination with a second biocidal material. The first step can be a flame assisted CVD step and the second step a plasma assisted CVD step or vice versa.
Abstract:
A method is disclosed for applying thermal spray particles to a composite, wherein the method includes the steps of providing a composite that includes a thermally sensitive surface, and applying the thermal spray particles at a temperature that is high enough to cause a temperature-dependent change in the thermally sensitive surface of the composite. The temperature-dependent change improves adhesion between the thermal spay particles and the composite.