Gas turbine engine seal and method for making same

Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Erodable or permanently deformable

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277 53, F01D 1108

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active

042577357

ABSTRACT:
A seal and method for making same is provided for use in a gas turbine engine. The seal includes a composite article having a substrate of sintered metallic fibers with an apparent density within the range of 14.0% to 22.5%. The substrate comprises a network of interconnected pores and metallic bonds at points of contact between fibers. The substrate further includes an external face having surface pores communicating with the network of pores. A thin film barrier surface layer, impervious to the passage of fluid, is disposed on the external face of the substrate and fills the surface pores.

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NASA Tech. Memo TM-X-73650 Apr. 1977.

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