US 11,655,720 B2
Methods and materials for repairing a thermal barrier coating of a gas turbine component
Hrishikesh Keshavan, Watervliet, NY (US); Atanu Saha, Bangaluru (IN); Margeaux Wallace, Niskayuna, NY (US); Mamatha Nagesh, Bangaluru (IN); Ambarish Jayant Kulkarni, Glenville, NY (US); and Bernard Patrick Bewlay, Jr., Niskayuna, NY (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on May 6, 2021, as Appl. No. 17/313,538.
Claims priority of application No. 202011025995 (IN), filed on Jun. 19, 2020.
Prior Publication US 2021/0396181 A1, Dec. 23, 2021
Int. Cl. F01D 5/28 (2006.01); F01D 5/00 (2006.01); B05D 5/00 (2006.01); B05D 7/24 (2006.01)
CPC F01D 5/288 (2013.01) [B05D 5/005 (2013.01); B05D 7/24 (2013.01); F01D 5/005 (2013.01); F05D 2220/32 (2013.01); F05D 2230/31 (2013.01); F05D 2230/80 (2013.01); F05D 2230/90 (2013.01); F05D 2240/35 (2013.01); F05D 2260/231 (2013.01); F05D 2300/611 (2013.01); F05D 2300/701 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A sprayable thermal barrier coating powder mixture for a gas turbine engine comprising:
a dry composition comprising a low surface area ceramic powder having a median particle size greater than 5 microns and less than 50 microns, and a high surface area ceramic powder having a median particle size smaller than 5 microns, wherein the low surface area ceramic powder makes up at least 50% by weight of the dry composition of the sprayable thermal barrier coating powder mixture;
wherein the low surface area ceramic powder has less than 10 meters squared of surface area per gram, and wherein the high surface area ceramic powder has greater than 10 meters squared of surface area per gram and less than 4,000 meters squared of surface area per gram; and
at least one organic binder additive configured to function as a binder only at temperatures up to 500° C. or below;
wherein the low surface area ceramic powder and the high surface area ceramic powder each comprise zirconia.