Patent ID: 6620457
Filing Date: 2003-09-16
Classification: B23P,C23C,Y02T

Abstract:
A method of applying a thermal barrier coating system to a metal piece having a first plurality of cooling holes angled in a first direction through the piece from a first surface of the piece to a second surface of the piece opposite the first surface, and a second plurality of cooling holes angled in a second direction different than said first direction through the piece from the first surface to the second surface, said method comprising the steps of:spraying a bond coat on said first surface of the piece at angles with respect to said first direction and said second direction and to a thickness selected in combination with the angles to prevent the bond coat from entirely filling any hole within said first plurality of cooling holes or any hole within said second plurality of cooling holes; spraying a thermal barrier coating on the bond coat at angles with respect to said first direction and said second direction and to a thickness selected in combination with the angles to prevent the thermal barrier coating from entirely filling any hole within said first plurality of coding holes or any hole within said second plurality of cooling holes; and spraying a high pressure fluid jet from a nozzle assembly through at least one hole within said first plurality of cooling holes in a direction generally parallel to said first direction to remove at least one of said band coat and said thermal barrier coating from said at least one hole within said first plurality of cooling holes.