Method for thermal barrier coating and a liner made using said method
First Claim
1. 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.
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Accused Products
Abstract
A method of applying a thermal barrier coating system to a metal piece having cooling holes angled in a first direction and cooling holes angled in a second direction. The method includes spraying a bond coat on a first surface of the piece at angles with respect to the first and second directions and to a thickness selected in combination with the angles to prevent the bond coat from entirely filling any of the holes. A thermal barrier coating is sprayed on the bond coat at angles with respect to the first and second directions and to a thickness selected in combination with the angles to prevent the thermal barrier coating from entirely filling any of the holes. The method also includes spraying a high pressure fluid jet from a nozzle assembly through each hole generally parallel to the respective cooling hole.
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Citations
20 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11)
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6. A method as set forth in claim 6 wherein the fluid jet is sprayed from the nozzle assembly at a pressure of about 45,000 pounds per square inch.
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12. A method of applying a thermal barrier coating system to an annular liner surrounding an axial centerline and extending between an upstream end and a downstream end, said liner having a first plurality of cooling holes angled in a first hole direction through the liner from an outer surface to an inner surface, and a second plurality of cooling holes angled in a second hole direction through the liner from the outer surface to the inner surface, said second hole direction having a circumferential component opposite that of said first hole direction, said method comprising the steps of:
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spraying a bond coat on the inner surface in a first spray direction having an axial component to a thickness selected in combination with the first spray direction 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 in a second spray direction having an axial component to a thickness selected in combination with the second spray direction to prevent the thermal barrier coating from entirely filling any hole within said first plurality of cooling 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 bond coat and said thermal barrier coating from said at least one hole with in said first plurality of cooling holes. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification