ABRADEABLE SEALING SYSTEM

摘要

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 coal thereon having a surface roughness of at least 300RA and a porous ceramic abradeable seal material on the bond coat having a porosity of from 5 to 15 volume %.