United Technologies Corporation

Daniel Anthony Grande

Thomas D Kasprow

Wayde R Schmidt

Paul Sheedy

Sergei F Burlatsky

Marcin Piech

David Ulrich Furrer

Sameh Dardona

Agnieszka M Wusatowska-Sarnek

Lesia V Protsailo

Cagatay Tokgoz

A blade outer airseal has a body comprising: an inner diameter (ID) surface; an outer diameter (OD) surface; a leading end; and a trailing end. The airseal body has a metallic substrate and a coating system atop the substrate along at least a portion of the inner diameter surface. At least over a first area of the inner diameter surface, the coating system comprises an abradable layer system comprising a plurality of layers including a relatively erosion-resistant first layer atop a relatively abradable second layer.

Outer airseal abradable rub strip

A wear monitoring system for measuring incursion depth into an abradable coating includes a layer of abradable coating including a depth. At least one measurement circuit includes a plurality of conductive leads disposed within the abradable coating. The conductive leads are spaced radially apart within a common radial plane corresponding to the depth of the abradable coating. A plurality of resistor elements corresponds with the plurality of conductive leads. Each of the plurality of resistor elements are in electrical communication with one of the plurality of conductive leads disposed within the common radial plane of the corresponding one of the plurality of conductive leads. An electrical characteristic of the circuit varies responsive to cutting of one or more of the plurality of conductive leads by a passing airfoil. A gas turbine engine and method are also disclosed.

Embedded sensor for in-situ monitoring of blade tip incursion

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West Hartford, CT, United States of America

Daniel Anthony Grande