US 11,919,819 B2
Ceramic matrix composite with interfacial coating system
Nitin Garg, West Hartford, CT (US); Olivier H. Sudre, Glastonbury, CT (US); Cristal Chan, East Hampton, CT (US); John H. Shaw, West Hartford, CT (US); and Ben Callaway, Hartford, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed on Jul. 11, 2022, as Appl. No. 17/861,417.
Claims priority of provisional application 63/227,386, filed on Jul. 30, 2021.
Prior Publication US 2023/0029877 A1, Feb. 2, 2023
Int. Cl. C04B 35/111 (2006.01); C04B 24/12 (2006.01); C04B 35/628 (2006.01); C04B 35/80 (2006.01); C04B 41/00 (2006.01); F02C 7/00 (2006.01)
CPC C04B 35/80 (2013.01) [C04B 35/62868 (2013.01); C04B 35/62873 (2013.01); C04B 35/62894 (2013.01); C04B 35/62897 (2013.01); F02C 7/00 (2013.01); C04B 2235/3826 (2013.01); C04B 2235/5244 (2013.01); F05D 2220/32 (2013.01); F05D 2240/35 (2013.01); F05D 2300/6033 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A ceramic matrix composite comprising:
a ceramic matrix;
fibers embedded in the ceramic matrix; and
an interfacial coating system on each of the fibers, the interfacial coating system including alternating layers of boron nitride layers of individual thicknesses of about 50 nanometers to 200 nanometers and carbon layers of individual thicknesses of less than 5 nanometers.
 
10. A gas turbine engine comprising:
a compressor section;
a combustor in fluid communication with the compressor section; and
a turbine section in fluid communication with the combustor, the turbine section having a turbine component that is formed of a ceramic matrix composite that includes:
a ceramic matrix,
fibers embedded in the ceramic matrix, and
an interfacial coating system on each of the fibers, the interfacial coating system including alternating layers of boron nitride layers of individual thicknesses of about 50 nanometers to 200 nanometers and carbon layers of individual thicknesses of less than 5 nanometers.