US 12,221,393 B2
Environmental barrier coating
Richard Wesley Jackson, Mystic, CT (US); Michael R. Kracum, Albuquerque, NM (US); Xia Tang, West Hartford, CT (US); and James T. Beals, West Hartford, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed on Dec. 23, 2022, as Appl. No. 18/088,152.
Application 18/088,152 is a division of application No. 16/785,085, filed on Feb. 7, 2020, granted, now 11,542,209.
Prior Publication US 2023/0128920 A1, Apr. 27, 2023
Int. Cl. C04B 41/45 (2006.01); C04B 41/50 (2006.01); C04B 41/52 (2006.01); C04B 41/86 (2006.01); C04B 41/89 (2006.01); F01D 5/28 (2006.01)
CPC C04B 41/5022 (2013.01) [C04B 41/4539 (2013.01); C04B 41/522 (2013.01); C04B 41/86 (2013.01); C04B 41/89 (2013.01); F01D 5/284 (2013.01); F01D 5/288 (2013.01); F05B 2220/30 (2013.01); F05B 2230/90 (2013.01); F05C 2253/12 (2013.01); Y10T 428/12493 (2015.01); Y10T 428/12611 (2015.01)] 9 Claims
OG exemplary drawing
 
1. A method of applying a barrier layer to a substrate, comprising:
mixing diffusive particles, gettering particles, and matrix material, in a carrier fluid to form a slurry, wherein at least a portion of the of the gettering particles have a first dimension defined along a first axis and a second dimension defined along a second axis that is generally perpendicular to the first axis, and wherein the first dimension is at least three times the second dimension, and wherein the portion includes at least 50% of the gettering particles;
applying the slurry to a substrate;
aligning the portion of the gettering particles such that the first axis is generally parallel to the substrate, wherein the aligning includes freezing the slurry; and
curing the slurry,
wherein the diffusive particles include at least one of barium-magnesium alumino-silicate BMAS) particles, barium strontium aluminum silicate particles, magnesium silicate particles, alkaline earth aluminum silicate particles, yttrium aluminum silicate particles, ytterbium aluminum silicate particles, and other rare earth metal aluminum silicate particles,
wherein the gettering particles include at least one of silicon oxycarbide (SiOC) particles, silicon carbide (SiC) particles, silicon nitride (Si3N4) particles, silicon oxycarbonitride (SiOCN) particles, silicon aluminum oxynitride (SiAION) particles, and silicon boron oxycarbonitride (SiBOCN) particles.