Tapered thermal barrier coating on convex and concave trailing edge surfaces
AssigneeUnited Technologies Corporation
InventorJeffrey R Levine
Life of this patent
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Abstract
A turbine engine component has an airfoil portion having a pressure side, a suction side, and a trailing edge. The trailing edge has a center discharge cooling circuit, which center discharge cooling circuit has an exit defined by a concave surface on the pressure side of the airfoil portion and a convex surface on the suction side of the airfoil portion. The airfoil portion has a thermal barrier coating on the pressure side and the suction side. The thermal barrier coating on the convex surface tapers to zero in thickness at a point spaced from the trailing edge so as to leave an uncoated portion on the convex surface.
Claims12
A turbine engine component comprising:
- an airfoil portion having a pressure side, a suction side, and a trailing edge;
- said trailing edge having a center discharge cooling circuit;
- said center discharge cooling circuit having an exit defined by a first surface on the pressure side of said airfoil portion and a second surface on the suction side of said airfoil portion;
- said airfoil portion having a thermal barrier coating on said pressure side and said suction side;
- and
- said thermal barrier coating on said second surface tapering to zero in thickness at a point spaced from said trailing edge so as to leave an uncoated portion on said second surface.
A process for forming a thermal barrier coating on a turbine engine component comprising the steps of:
- forming a turbine engine component having an airfoil portion and a central discharge cooling circuit in a trailing edge portion of said airfoil portion having an exit defined by a first surface on a pressure side of said airfoil portion and a second surface on a suction side of said airfoil portion;
- forming a thermal barrier coating on said pressure side and said suction side of said airfoil portion;
- and
- said forming step comprising forming a thermal barrier coating on said second surface tapering to zero in thickness at a point spaced from said trailing edge so as to leave an uncoated portion on said second surface.
Dependencies are inferred from the claim text.