Abstract:
A method for making an aluminum substrate that is subjected to repeated impaction more wear resistant. The method comprises applying at least about 0.005 inch thick coating of an amorphous composition directly to only portions of this substrate, preferably after it is shaped into a product for transporting consumable materials. The coating composition to which steel, aluminum, PTFE and/or polyethylene may be added, can be thermally sprayed to the substrate surface.
Abstract:
An improved chemical vapor deposition apparatus and procedure is disclosed. The technique provides improved shielding of the reaction and deposition zones involved in providing CVD coatings, whereby coatings can 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:
A method for chemical vapor deposition using a very fine atomization or vaporization of a reagent containing liquid or liquid-like fluid near its supercritical temperature, where the resulting atomized or vaporized solution is entered into a flame or a plasma torch, and a powder is formed or a coating is deposited onto a substrate. The combustion flame can be stable from 10 torr to multiple atmospheres, and provides the energetic environment in which the reagent contained within the fluid can be reacted to form the desired powder or coating material on a substrate. 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 plasma, 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 process for producing plastic layers on gap sealing surfaces which are unaffected by temperature changes is provided. Plasma or acetylene oxygen flame is generated by a plasma or flame spraying burner, which melts a plastic mass under a cooling gas flow of from 40 to 150 SLpM and sprays it onto a gap sealing surface. Coatings produced by this process have dense to porous layer structures and, when polyphenylene sulfides are used as the plastic material, may be used up at to temperatures of 250.degree. C.
Abstract:
In a process for powder coating high temperature resistant surfaces with multilayer coatings, particularly of fluoroplastics, thick coatings can be obtained by maintaining the flowability of the layer previously applied below its run-off limit while applying a subsequent layer.
Abstract:
A system is described for coating a cylindrical surface of a long thin workpiece by a process which includes flame spray coating that heats the workpiece to a large portion of its melting temperature and which is followed by grinding of the coated cylindrical surface, which produces a final coated surface of more uniform coating thickness than heretofore. The workpiece is rotated about a vertical axis, to avoid slight bending deformation of it, the upper end of the workpiece is allowed to move slightly towards and away from its opposite end, and an upward bias is applied to the chuck device that engages the upper end of the rotating workpiece to avoid column-like buckling of it.
Abstract:
A method of bonding a thermoplastic rotating band onto a projectile including the steps of designating, e.g., machining, a band seat zone onto a metallic, e.g., steel, projectile body, coating the band seat zone with a sprayed metallic coating, and applying a polymer in liquid form around said zone and to said sprayed metallic coating to form a plastic rotating band.
Abstract:
PURPOSE: A multi-component ceramic coating material for being thermally sprayed is provided to reduce internal defects of a protection coating film, to improve corrosion resistance, and to prolong the life span of the parts. CONSTITUTION: A multi-component ceramic coating material for being thermally sprayed on the parts of semiconductor processing devices comprises a composition of Al_(2(1-x))Zr_xO_(3-x), wherein x is 0.2-0.8. A method for preparing the coating material for the thermal spray comprises the steps of: mixing Al2O3 particles and ZrO2 particles with a diameter 0.1-30 microns to prepare a material with a composition of Al_(2(1-x))Zr_xO_(3-x); spraying and drying the material to form synthetic powder; and incinerating the powder at 800-1500 °C.
Abstract:
PURPOSE: A thermal spray coating composition and a manufacturing method thereof are provided to easily apply the composition to an object, and to secure the excellent acid resistance, and environment-friendly property. CONSTITUTION: A manufacturing method of a thermal spray coating composition using oyster shells comprises the following steps: washing the oyster shells, plasticizing, and crushing to form oyster shell powder; dipping the oyster shell powder to silica sol with the solid component content of 10~30wt% of to absorb-coating silica to the oyster shell powder, and drying; and mixing the oyster shell powder with metal zinc, phosphoric acid, and thermoplastic powder.
Abstract:
PURPOSE: A primer composition for the thermoplastic resin thermal spray coating and a primer prepared by using the composition are provided, wherein the primer composition is used to increase the adhesive strength between a polymer coating material and a substrate to be coated. CONSTITUTION: The primer composition comprises 100 parts by weight of an epoxy resin; and 2-5 parts by weight of glycidyl methacrylate. Preferably a thermoplastic polymer resin capable of thermal spraying on the primer coating formed by the primer composition is the powder selected from a high density polyethylene, a low density polyethylene, a linear low density polyethylene, a super high molecular weight polyethylene, an ethylene-acrylic acid copolymer or an ethylene-vinyl alcohol copolymer, wherein the powder has a particle size of 60-200 micrometers.