US 12,448,923 B2
Protective treatment and method of applying the same
Hamidreza Mohseni, Avon, CT (US); and Lesley Dawag, West Hartford, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Mar. 13, 2023, as Appl. No. 18/183,145.
Prior Publication US 2024/0309815 A1, Sep. 19, 2024
Int. Cl. F02C 7/28 (2006.01); F16J 15/324 (2016.01)
CPC F02C 7/28 (2013.01) [F16J 15/324 (2013.01); F05D 2230/31 (2013.01); F05D 2240/55 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sealing system, comprising:
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 including 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.