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 |
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.
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