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.
Claims20
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;
- and
- a plurality of abradable particles, the plurality of abradable particles including hollow spheres of one or more oxides.
A method of reducing rub damage to at least one part of a turbine engine, the method comprising:
- applying an abradable coating to a first part of a turbine engine in a location prone to rubbing with a second part of the turbine engine, the abradable coating including a metallic composite, a brittle alloy and a plurality of abradable particles,
- 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),
- the brittle alloy including at least 20 weight percent of aluminum (Al) and at least one other metal, and
- the plurality of abradable particles including hollow spheres of one or more oxides.
A turbine engine part having an abradable coating on at least a portion of a surface thereof, the 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;
- and
- a plurality of abradable particles, the plurality of abradable particles including hollow spheres of one or more oxides.
Dependencies are inferred from the claim text.