US 12,467,523 B2
Coating for a tribological surface of a component
Lucia Azzini, Turin (IT); Fabio De Bellis, Turin (IT); and Andrea Piazza, Turin (IT)
Assigned to GE Avio S.r.l., Rivalta di Torino (IT)
Filed by GE Avio S.r.l., Rivalta di Torino (IT)
Filed on Sep. 29, 2021, as Appl. No. 17/488,784.
Claims priority of application No. 102021000012398 (IT), filed on May 13, 2021.
Prior Publication US 2022/0364636 A1, Nov. 17, 2022
Int. Cl. F16H 55/06 (2006.01); C23C 14/06 (2006.01); C23C 16/26 (2006.01); C23C 16/30 (2006.01); C23C 16/34 (2006.01); C23C 16/50 (2006.01); C23C 24/04 (2006.01); C23C 28/04 (2006.01); F02C 7/36 (2006.01); F16H 1/28 (2006.01); F16H 57/08 (2006.01)
CPC F16H 55/06 (2013.01) [C23C 14/0688 (2013.01); C23C 16/26 (2013.01); C23C 16/303 (2013.01); C23C 16/34 (2013.01); C23C 16/50 (2013.01); C23C 24/04 (2013.01); C23C 28/044 (2013.01); F02C 7/36 (2013.01); F05D 2220/32 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A component comprising:
a metallic substrate having a tribological surface; and
a coating comprising:
a first layer disposed on the tribological surface, the first layer comprising chromium nitride (CrN), hard chromium, thin dense chrome (TDC) or chromium, wherein the first layer has a thickness of 0.25 microns to 12 microns; and
a second layer disposed on the first layer, the second layer comprising a disulfide.
 
7. A gearbox comprising:
a first gear comprising a metallic substrate having a tribological surface and a coating, the coating comprising a first layer disposed on the tribological surface and a second layer disposed on the first layer, wherein the first layer comprises chromium nitride (CrN), hard chromium, thin dense chrome (TDC) or chromium, and wherein the first layer has a thickness of 0.25 microns to 12 microns, and wherein the second layer comprises a disulfide.