Rtx Corporation

Hamidreza Mohseni

Matthew E Bintz

David R Lyders

Fadi S Maalouf

Xiaomei Fang

Peter T Schutte

Calvin Jay Winder

Pieter Van Lieu

Anna Lauren Wright

Lesley Dawag

Justin Roger DeLarm

The present disclosure provides assemblies, systems and methods for surface modification of piston seal rings and interfacing components. More particularly, the present disclosure provides assemblies, systems and methods for surface modification of mid-turbine frame (MTF) piston seal rings and interfacing components in gas turbine engines to achieve low and/or reduced friction, and/or high and/or improved wear resistance.

Methods for surface modification of mid-turbine frame piston seal rings and interfacing components to achieve low friction and high wear resistance

A sealing system includes a shaft, a rotor configured to rotate with respect to the shaft, and a carbon-carbon composite seal ring arranged around the shaft such that it seals against the rotor. The carbon-carbon composite seal ring includes a monoaluminum phosphate binder layer disposed on at least one surface of the carbon-carbon composite seal ring and a ceramic layer disposed over the monoaluminum phosphate binder layer on the least one surface of the carbon-carbon composite seal ring. A method of manufacturing a seal is also disclosed.

Protective treatment and method of applying the same

A gas turbine engine includes a rotor that that has a seal surface, a shaft that has an annular seal channel that opens to the seal surface, and a seal disposed in the annular seal channel for sealing against the seal surface. The seal is made of a composite having carbon fibers disposed in a carbon matrix.

Gas turbine engine with carbon/carbon composite piston seal

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Avon, CT, United States of America

Hamidreza Mohseni