Apparatus having engineered surface feature and method to reduce wear and friction between CMC-to-metal attachment and interface

摘要

An apparatus having reduced wear and friction between CMC-to-metal attachment and interface of the apparatus, including a CMC component having a surface. The CMC component surface is configured for sliding contact with a surface of a metal component, the sliding contact resulting in formation of debris along the contacting surfaces. The surface of the CMC component has an engineered surface feature formed therein to substantially prevent an accumulation of debris along the contacting surfaces.

主权项

1. A rotor blade for a gas turbine engine comprising:
an airfoil extending between a root having a pair of opposed surfaces and a tip opposite the root; and a rotor disk including a slot configured to receive the root, the rotor disk having a pair of opposed surfaces configured to form a sliding contact with the pair of root surfaces, the sliding contact resulting in formation of debris along the sliding contact surfaces; the root including engineered surface features formed therein and continuously extending in an axial direction along the entire axial extent of the root surfaces to substantially prevent an accumulation of debris along the surfaces of sliding contact.