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Compliant sleeve for ceramic turbine blades

United States Patent

6,132,175
October 17, 2000
View the Complete Patent at the US Patent & Trademark Office
A compliant sleeve for attaching a ceramic member to a metal member is comprised of a superalloy substrate having a metal contacting side and a ceramic contacting side. The ceramic contacting side is plated with a layer of nickel followed by a layer of platinum. The substrate is then oxidized to form nickel oxide scale on the ceramic contacting side and a cobalt oxide scale on the metal contacting side. A lubricious coating of boron nitride is then applied over the metal contacting side, and a shear-stress limiting gold coating is applied over the ceramic contacting side.
Cai; Hongda (Chandler, AZ), Narasimhan; Dave (Flemington, NJ), Strangman; Thomas E. (Phoenix, AZ), Easley; Michael L. (Tempe, AZ), Schenk; Bjoern (Phoenix, AZ)
AlliedSignal, Inc. (Morris Township, NJ)
09/ 083,394
May 22, 1998
GOVERNMENT RIGHTS The Government of the United States of America has rights in this invention pursuant to Contract No. DEN3-335 awarded by the United States Department of Energy.