US 11,952,916 B2
Self-lubricating blade root/disk interface
Pantcho P. Stoyanov, West Hartford, CT (US); Kelly M. Harrington, Wethersfield, CT (US); and Thomas D. Kasprow, Glastonbury, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Aug. 14, 2020, as Appl. No. 16/993,326.
Prior Publication US 2022/0049611 A1, Feb. 17, 2022
Int. Cl. F01D 5/30 (2006.01); F01D 5/28 (2006.01)
CPC F01D 5/3092 (2013.01) [F01D 5/288 (2013.01); F05D 2260/98 (2013.01); F05D 2300/611 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A coated blade root/disk interface, comprising:
a blade having a blade root;
a disk having a socket, the blade root being engaged in the socket with contact surfaces defining at least one interface between the blade root and the socket of the disk;
a coating at the at least one interface, wherein the coating comprises a layer of soft metal matrix, and a solid lubricant distributed through the soft metal matrix, wherein the soft metal matrix is CuAl, and wherein the solid lubricant is molybdenum disulfide, wherein the layer contains between 10 and 20 weight percent of solid lubricant, between 80 and 90 weight percent of soft metal matrix, and between 2 and 8 weight percent of aluminum, with balance copper.