Processing method for solid core ceramic matrix composite airfoil
AssigneeSiemens Energy, Inc.
InventorsGary B. Merrill, Christian X. Campbell, Thomas Barrett Jackson
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Abstract
A method of processing solid core ceramic matrix composite articles. The method improves the physical characteristics of the article by forming the airfoil using a co-processing method wherein a refractory ceramic is cast against a preformed ceramic matrix composite (CMC) shell. In one aspect, the shell is continuous to help prevent delaminations. In another aspect, the shell is open. In one embodiment, the article includes a split line. The split line helps the article to be less susceptible to damage caused from internal strain.
Claims9
A method of forming a solid core ceramic airfoil, comprising:
- forming a ceramic matrix composite shell, wherein the ceramic matrix composite shell is a continuous shell;
- casting the solid core of the article using the ceramic matrix composite shell as a mold for the solid core, wherein a split line is formed in a middle region of the solid core such that the split line extends a length of the airfoil from a leading edge of the solid core into the middle region and terminates at a termination point closer to the trailing edge than the leading edge of the solid core, wherein the split line tapers in width linearly moving from the leading edge to the termination point near the trailing edge;
- drying the solid core;
- and
- firing the solid core.
Dependencies are inferred from the claim text.