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US 11,149,354 B2Granted
Dense abradable coating with brittle and abradable components
AssigneeGeneral Electric Company
InventorsKrishnamurthy Anand, Eklavya Calla, Biju Dasan, Surinder Singh Pabla, Priyanka Saxena
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Abstract
Various embodiments include a dense abradable coating, a method of reducing rub damage to a turbine engine part by applying the dense abradable coating thereto, and a turbine engine part having the abradable coating thereon. Particular embodiments include a dense abradable coating including a pore-free metallic composite, a high-aluminum containing brittle alloy, and a plurality of hollow abradable particles.
Claims18
An abradable coating comprising:
- a metallic composite, the metallic composite being pore free and including two or more metals selected from iron (Fe), nickel (Ni), aluminum (Al), chromium (Cr), titanium (Ti), yttrium (Y) and cobalt (Co);
- a brittle alloy, the brittle alloy including at least 20 weight percent of aluminum (Al) and at least one other metal, wherein the abradable coating includes 20 to 30 weight percent of the brittle alloy;
- and
- a plurality of abradable particles, the plurality of abradable particles including hollow spheres of one or more oxides, wherein the metallic composite constitutes 40 to 60 weight percent of the abradable coating and includes CoNiCrAlY.
1 more element
Dependencies are inferred from the claim text.