US 12,473,977 B2
Methods for surface modification of mid-turbine frame piston seal rings and interfacing components to achieve low friction and high wear resistance
Hamidreza Mohseni, Avon, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Oct. 10, 2022, as Appl. No. 17/962,668.
Prior Publication US 2024/0117880 A1, Apr. 11, 2024
Int. Cl. F16J 9/26 (2006.01); F01D 11/00 (2006.01)
CPC F16J 9/26 (2013.01) [F01D 11/005 (2013.01); F05D 2220/32 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A piston seal ring assembly comprising:
a piston seal ring configured to be in contact with a mid-turbine frame vane component and an interfacing component;
wherein the piston seal ring includes a glaze layer of oxide particles fabricated from a surface treatment or surface modification, wherein the glaze layer is disposed on a cobalt-molybdenum-chromium-silicon based coating material, and
wherein the mid-turbine frame vane component or the interfacing component includes a second glaze layer of oxide particles fabricated from a surface treatment or surface modification.