Method for repairing a ceramic fiber reinforced ceramic composite article and corresponding intermediate

摘要

Methods for repairing a turbine airfoil (24) constructed from a CMC material are provided via filling a cavity (26) located in the turbine airfoil (24) with a ceramic paste (50) (e.g., including a ceramic powder and a binder), heating the ceramic paste (50) in the cavity (26) to remove the binder, thereby forming a porous ceramic material, and adding a molten ceramic material to the porous ceramic material. The cavity (26) can be defined in an airfoil (30) of the turbine airfoil (24) (e.g., on a tip or cap (36) of the airfoil (30)). Intermediates formed during the repair of a turbine airfoil (24) are also provided. The intermediate can generally include an airfoil (30) comprising a CMC material, a cavity (26) defmed in the airfoil (30), and a porous ceramic material (52) filling the cavity (26).