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AssigneeUnion Carbide Corporation
InventorsJohn E. Jackson, Norman L. Balmer
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A rotary gas seal in which a first member, e.g., a tip, cooperates with a second member to inhibit gas flow therebetween, the improvement wherein, the tip is provided with a ceramic or metallic coating bonded thereto, the surface of the coating having a plurality of laser-formed depressions and providing a wear-resistant, cutting surface capable of cutting into the second member. Also, a turbine or compressor blade having a tip surface adapted to cooperate with a sealing surface to form a seal between the blade and the sealing surface and a ceramic or metallic carbide coating bonded to said tip surface, the coating having a plurality of laser-formed depressions and providing a wear-resistant, cutting surface capable of cutting into the sealing surface.
A rotary gas seal comprising a first member, and a second member, in which the first member is adapted to move in relation to the second member and has a tip surface cooperating with a sealing surface of the second member to inhibit gas flow between the tip surface and sealing surface, said tip surface coating with a coating selected from the group consisting of ceramic coatings and metallic carbide coatings;
A blade comprising a tip surface adapted to cooperate with a sealing surface moving relative to the tip surface to inhibit gas flow between the sealing surface and the tip surface, said tip surface coated with a coating selected from the group comprising ceramic coatings and metallic carbide coatings;
Dependencies are inferred from the claim text.