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US 6,623,796 B1Granted
Method of producing a coating using a kinetic spray process with large particles and nozzles for the same
AssigneeDelphi Technologies, Inc.
InventorThomas Hubert Van Steenkiste
Life of this patent
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Abstract
A method of depositing large particles having an average nominal diameter of greater than 106 microns up to 250 microns onto substrates using a kinetic spray system is disclosed. The method utilizes a powder injector tube having a reduced inner diameter and a de Laval type nozzle having an elongated throat to exit end length. The method permits deposition of much larger particles than previously possible.
Claims20
A method of kinetic spray coating a substrate comprising the steps of:
- a) providing particles having an average nominal diameter of greater than 106 to 250 microns;
- b) entraining the particles into a flow of a gas, the gas at a temperature below a melt temperature of the particles;
- and
- c) directing the particles entrained in the flow of gas through a supersonic nozzle having a length from a throat to an exit end of from 200 to 400 millimeters, thereby accelerating the particles to a velocity sufficient to result in adherence of the particles on a substrate positioned opposite the nozzle.
1 more element
A method of kinetic spray coating a substrate comprising the steps of:
- a) providing particles having an average nominal diameter equal of greater than 106 to 250 microns;
- b) passing the particles through a powder injector tube having an inner diameter equal to or less than 0.90 millimeters and into a flow of a gas;
- c) entraining the particles into the flow of the gas, the gas at a temperature below a melt temperature of the particles;
- and
- d) directing the particles entrained in the flow of gas through a supersonic nozzle having a length from a throat to an exit end of from 200 to 400 millimeters thereby accelerating the particles to a velocity sufficient to result in adherence of the particles on a substrate positioned opposite the nozzle.
2 more elements
Dependencies are inferred from the claim text.