US 12,404,219 B2
CMAS-resistant barrier coatings
Ngunjoh Lawrence Ndamka, London (GB); Li Li, Indianapolis, IN (US); Stephanie Gong, Indianapolis, IN (US); Ann Bolcavage, Indianapolis, IN (US); Taylor K. Blair, Indianapolis, IN (US); and Robert Golden, Indianapolis, IN (US)
Assigned to Rolls-Royce Corporation, Indianapolis, IN (US); and Rolls-Royce plc, London (GB)
Filed by Rolls-Royce Corporation, Indianapolis, IN (US); and ROLLS-ROYCE PLC, London (GB)
Filed on Mar. 12, 2024, as Appl. No. 18/602,946.
Application 18/602,946 is a division of application No. 16/657,504, filed on Oct. 18, 2019, granted, now 11,952,317.
Claims priority of provisional application 62/876,272, filed on Jul. 19, 2019.
Claims priority of provisional application 62/796,977, filed on Jan. 25, 2019.
Claims priority of provisional application 62/747,535, filed on Oct. 18, 2018.
Prior Publication US 2024/0217888 A1, Jul. 4, 2024
Int. Cl. C04B 41/50 (2006.01); C04B 41/45 (2006.01); F01D 5/28 (2006.01)
CPC C04B 41/5024 (2013.01) [C04B 41/4543 (2013.01); F01D 5/284 (2013.01); F01D 5/288 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method comprising:
forming a barrier coating on a substrate of a component, wherein the barrier coating comprises:
a matrix comprising a rare-earth disilicate, the matrix extending from an inner interface facing the substrate to an outer surface opposite the inner interface; and
a graded volumetric distribution of rare-earth oxide rich (REO-rich) phase regions in the matrix along a direction from the inner interface to the outer surface, wherein the REO-rich phase regions define bands in predetermined locations within the matrix, and wherein the matrix has a higher volumetric density of the REO-rich phase regions in a first region nearer the outer surface than in a second region nearer the inner interface.