Airfoil for a turbine system

Abstract

An airfoil includes a main portion formed of a base material. Also included is a trailing edge region of the main portion. Further included is a trailing edge supplement structure comprising at least one pre-sintered preform (PSP) material operatively coupled to the base material proximate the trailing edge region.

1 . An airfoil comprising:
 a main portion formed of a base material;   a trailing edge region of the main portion; and   a trailing edge supplement structure comprising at least one pre-sintered preform (PSP) material operatively coupled to the base material proximate the trailing edge.   
     
     
         2 . The airfoil of  claim 1 , wherein the trailing edge supplement structure is brazed to the trailing edge region. 
     
     
         3 . The airfoil of  claim 1 , further comprising at least one cooling channel formed in the base material of the main portion. 
     
     
         4 . The airfoil of  claim 3 , further comprising at least one cooling passage formed in the trailing edge supplement structure, the at least one cooling passage in fluid communication with the at least one cooling channel. 
     
     
         5 . The airfoil of  claim 1 , further comprising a trailing edge supplement structure aft width and a trailing edge region aft width, wherein the trailing edge supplement structure aft width is less than the trailing edge region aft width. 
     
     
         6 . The airfoil of  claim 1 , wherein the at least one PSP material comprises a first alloy and a second alloy. 
     
     
         7 . The airfoil of  claim 6 , wherein the first alloy and the second alloy are mixed together at a weight ratio of about 30:70. 
     
     
         8 . The airfoil of  claim 1 , wherein the at least one PSP material comprises a first PSP material and a second PSP material operatively coupled together. 
     
     
         9 . The airfoil of  claim 8 , wherein at least one of the first PSP material and the second PSP material includes a slot, wherein operative coupling of the first PSP material and the second PSP material forms at least one cooling passage. 
     
     
         10 . The airfoil of  claim 9 , wherein the at least one cooling passage is in fluid communication with at least one cooling channel formed in the base material of the main portion. 
     
     
         11 . A turbine system comprising:
 an airfoil;   a main portion of the airfoil extending from a leading edge to a trailing edge and formed of a base material;   a trailing edge supplement structure comprising a first PSP material and a second PSP material, the first PSP material and the second PSP material joined to the base material of the main portion proximate the trailing edge; and   at least one cooling passage within the trailing edge supplement structure.   
     
     
         12 . The turbine system of  claim 11 , wherein at least one of the first PSP material and the second PSP material includes a slot, wherein operative coupling of the first PSP material and the second PSP material forms the at least one cooling passage. 
     
     
         13 . The turbine system of  claim 11 , wherein the at least one cooling passage is in fluid communication with at least one cooling channel formed in the base material of the main portion. 
     
     
         14 . The turbine system of  claim 11 , further comprising a trailing edge supplement structure aft width and a trailing edge region aft width, wherein the trailing edge supplement structure aft width is less than the trailing edge region aft width. 
     
     
         15 . The turbine system of  claim 11 , wherein each of the first PSP material and the second PSP material comprises a first alloy and a second alloy. 
     
     
         16 . The turbine system of  claim 15 , wherein the first alloy and the second alloy are mixed together at a weight ratio of about 30:70. 
     
     
         17 . A method of repairing a trailing edge region of an airfoil comprising:
 removing material proximate the trailing edge region of the airfoil;   exposing a base material of the trailing edge region;   joining at least one PSP material to the base material; and   forming a trailing edge supplement structure upon joining of the at least one PSP material to the base material.   
     
     
         18 . The method of  claim 17 , further comprising forming at least one cooling passage within the at least one PSP material prior to joining the at least one PSP material to the base material. 
     
     
         19 . The method of  claim 17 , further comprising forming at least one cooling passage within the at least one PSP material after joining the at least one PSP material to the base material. 
     
     
         20 . The method of  claim 17 , wherein the trailing edge supplement structure comprises a first PSP material and a second PSP material, the method further comprising forming at least one cooling passage within the trailing edge supplement structure by aligning a first slot of the first PSP material and a second slot of the second PSP material.