Blade outer air seal
First Claim
Patent Images
1. A turbine engine blade outer air seal segment comprising:
- a body having;
a base portion having;
a transversely concave inner diameter (ID) face;
a forward end;
an aft end; and
first and second circumferential edges; and
at least one mounting hook,wherein;
the body comprises a metallic member and a pre-formed ceramic member;
the ceramic member and metallic member are joined along the base portion with the ceramic member inboard of the metallic member; and
the ceramic member and metallic member are so joined by a braze, the braze forming at least one projection interfitting with a complementary feature of the ceramic member.
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Abstract
A turbine engine blade outer air seal segment has a body having a base portion. The base portion has a transversely concave ID face, a forward end, an aft end, and first and second circumferential edges. The body has at least one mounting hook. The body comprises a metallic member and a ceramic member. The ceramic member and metallic member are joined along the base portion with the ceramic member inboard of the metallic member.
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Citations
20 Claims
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1. A turbine engine blade outer air seal segment comprising:
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a body having; a base portion having; a transversely concave inner diameter (ID) face; a forward end; an aft end; and first and second circumferential edges; and at least one mounting hook, wherein; the body comprises a metallic member and a pre-formed ceramic member; the ceramic member and metallic member are joined along the base portion with the ceramic member inboard of the metallic member; and the ceramic member and metallic member are so joined by a braze, the braze forming at least one projection interfitting with a complementary feature of the ceramic member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for manufacturing a turbine engine blade outer air seal segment, the method comprising:
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pre-forming a metallic body having; a base portion having; an ID face; a forward end; an aft end; a first circumferential edge; a second circumferential edge; and at least one mounting hook; forming a ceramic member having; an outer diameter (OD) face; a transversely concave inner diameter (ID) face; a forward end; an aft end; a first circumferential edge; a second circumferential edge; and at least one engagement feature along the OD face of the ceramic member; and securing the ceramic member to the base portion ID face via the at least one engagement feature, wherein; the forming of the ceramic member comprises; positioning a first sacrificial element in a mold; positioning a second sacrificial element in the mold; introducing a slurry to the mold; hardening the slurry; and destructively removing the first sacrificial element to leave porosity and the second sacrificial element to leave the engagement feature. - View Dependent Claims (16, 17, 18, 19)
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20. A turbine engine blade outer air seal segment comprising:
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a metallic member; a pre-formed ceramic member joined to the metallic member inboard of the metallic member and having; a transversely concave inner diameter (ID) face; an outer diameter (OD) face; at least one engagement feature along the OD face; a forward end; an aft end; and first and second circumferential edges; and a braze extending from the metallic member into the engagement feature.
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Specification