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US 6,537,021 B2Granted
Abradeable seal system
AssigneeChromalloy Gas Turbine Corporation
InventorsPeter Howard, Ravi Shankar, Richard Fenton
Life of this patent
Estimating the term…
Abstract
A gas turbine engine abradeable seal system is provided comprising a seal assembly and a cooperating interacting turbine blade. The turbine blade has a tip portion containing cubic boron nitride abrasive particles and the seal assembly has a superalloy substrate with a bond coat thereon having a surface roughness of at least 300 RA and a porous ceramic abradeable seal material on the bond coat having a porosity of from 5 to 15 volume %.
Claims11
A gas turbine engine abradeable seal system comprising:
- a seal assembly and a cooperating interacting turbine blade;
- the turbine blade having a tip portion containing cubic boron nitride abrasive particles for contacting the seal assembly to provide sealing;
- the seal assembly having a superalloy substrate, an MCrAlY bond coat on the surface of the substrate having a surface roughness of greater than 300 RA, wherein M is selected from the group consisting of Co, Ni or Ni and Co, and a porous ceramic abradeable seal material on the bond coat having a porosity of from 5 to 15 vol %.
Dependencies are inferred from the claim text.