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US 4,375,233 AGranted
Method of making a turbine blade having a metal core and a ceramic airfoil
OwnerAxel Rossmann, Werner Hutherinventors
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Abstract
A finished ceramic airfoil is provided having within it a lining of thermal insulation and a fusible core having the desired contour of the metal core of the turbine blade. A casting mold is provided around the airfoil. The fusible core is melted and removed, leaving a cavity in the airfoil surrounded by the insulation lining. The cavity is filled with molten metal which is allowed to solidify to form the metal core of the turbine blade.
Claims12
A method of making a turbine blade having a metal core and a ceramic airfoil, comprising the steps of
- (a) providing a finished ceramic airfoil having within it
- I. a lining of thermal insulation material of high elasticity, and
- II. a fusible core having the desired contour of the metal core,
- (b) providing a casting mold around the ceramic airfoil,
- (c) melting and removing the fusible core from the ceramic airfoil to leave a cavity within the airfoil surrounded by the insulation lining,
- (d) filling the cavity with a molten metal, and
- (e) allowing the molten metal to solidify to form the metal core of the turbine blade.
4 more elements
Dependencies are inferred from the claim text.