Needled ceramic matrix composite cooling passages
A method for forming a passage in a ceramic matrix composite component includes forming a core for a ceramic matrix composite component; embedding a hollow member into the core at a desired location for a passage in the ceramic matrix composite component; wrapping the core with a ceramic material; and inserting a rod through the hollow member and into the core.
1. A method for forming a passage in a ceramic matrix composite component, the method comprising:
forming a core for a ceramic matrix composite component;
embedding a hollow member into the core at a desired location to form a passage in the ceramic matrix composite component;
wrapping the core with a ceramic material; and
inserting a rod through the hollow member and into the core.
2. The method as recited in claim 1 , wherein the ceramic material comprises a plurality of fibers through which the hollow member extends but does not cut.
3. The method as recited in claim 1 , wherein wrapping the core with the ceramic material comprises separating a plurality of fibers around the hollow member.
4. The method as recited in claim 1 , wherein wrapping the core with the ceramic material comprises penetrating the ceramic material with the hollow member.
5. The method as recited in claim 1 , wherein the rod is manufactured of the same material as the core.
6. The method as recited in claim 1 , wherein the rod is of a desired cooling passage shape.
7. The method as recited in claim 1 , wherein the hollow member comprises a sharpened end.
8. The method as recited in claim 1 , wherein the hollow member is a needle.
9. The method as recited in claim 1 , wherein an inner surface of hollow member is sized to receive the rod.
10. The method as recited in claim 1 , wherein the hollow member is manufactured of metal.
11. The method as recited in claim 1 , further comprising coaxially forming a blind hole in the core for the rod within a blind hole in the core for the hollow member.
12. The method as recited in claim 1 , further comprising gluing the rod into a blind hole in the core.
13. The method as recited in claim 1 , further comprising removing the hollow member and leaving the rod in the core.
14. The method as recited in claim 13 , further comprising removing the core and the rod from the ceramic material.
15. The method as recited in claim 13 , further comprising burning out the core and the rod from the ceramic material.
16. The method as recited in claim 1 , further comprising forming the hollow member of a nylon.
17. The method as recited in claim 16 , further comprising burning out the core, the hollow member, and the rod from the ceramic material.