Patent ID: 8197184

Claim:
A vane cluster comprising a coated metallic substrate including: a platform; a shroud; at least first and second airfoils extending between an outer face of the platform and an inner face of the shroud, each airfoil having a pressure side and a suction side, the pressure side of the first airfoil facing the suction side of the second airfoil; and a cooling passageway system including one or more first feed passageways in the first airfoil and one or more second feed passageways in the second airfoil, wherein: at least a first side selected from the pressure side of the first airfoil and the suction side of the second airfoil includes a first region with a local thinning or gap in the coating; along said first side, the cooling passageway system includes means for supplementally locally cooling said first region, the means focusing cooling to the first side at the first region; the first side is the pressure side of the first airfoil; the suction side of the second airfoil includes a second region with a local thinning or gap in the coating; along said suction side of the second airfoil, the cooling passageway system includes means for supplementally locally cooling said second region of the second airfoil; the means for supplementally locally cooling said first region comprises a first in-wall circuit with flow between the platform and shroud; and the means for supplementally locally cooling said second region comprises a second in-wall circuit with flow between the platform and shroud.