Patent ID: 6258416
Filing Date: 2001-07-10
Classification: B05B,C23C

Abstract:
A method of forming a coating on a substrate, the method comprising:providing at least two feedstock wire elements of which at least one is in the form of a titanium element;feeding the feedstock elements towards a point of intersection located in a throat of a nozzle;supplying a nitrogen-rich gas to the throat of the nozzle at a pressure sufficient to cause choked gas flow in the throat; generating an arc between the feedstock elements at the point of intersection so that rapid heating of the gas in the throat by the arc accelerates the choked gas flow and generates a supersonic gas flow leaving the nozzle with the spray of the finely atomized particles entrained therein; andspraying the finely atomized particles into a substrate to form a coating comprising titanium nitride on the substrate.