EP 0185603 B1 19891108 - IMPROVED DURABILITY METALLIC-CERAMIC TURBINE AIR SEALS
Title (en)
IMPROVED DURABILITY METALLIC-CERAMIC TURBINE AIR SEALS
Publication
Application
Priority
US 67579784 A 19841128
Abstract (en)
[origin: EP0185603A1] An improved durability turbine air seal comprises a metallic substrate, a metallic bond coat on the substrate, a continuously graded metal-ceramic layer on the bond coat and an outer layer of pure ceramic. The continuously graded metal-ceramic layer consists of a ceramic material having a reduced oxygen permeability compared to the zirconia material used in the prior art and a metallic material having a high resistance to oxidation. The seal is fabricated by plasma spraying with controlled subtrate temperatures to induce in the sample a controlled strain distribution so as to make the seal resistant to failure in service. Other concepts for reducing the liability of the seal to failure by oxidation are described.
IPC 1-7
IPC 8 full level
C23C 4/06 (2006.01); C23C 4/02 (2006.01); C23C 4/10 (2006.01); F01D 11/08 (2006.01); F01D 11/12 (2006.01); F02C 7/28 (2006.01)
CPC (source: EP)
C23C 4/02 (2013.01); C23C 4/11 (2016.01); F01D 11/122 (2013.01)
Citation (examination)
US 4481237 A 19841106 - BOSSHART GEORGE S [US], et al
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
EP 0185603 A1 19860625; EP 0185603 B1 19891108; DE 3574168 D1 19891214; JP H0340105 B2 19910617; JP S61153269 A 19860711
DOCDB simple family (application)
EP 85630204 A 19851127; DE 3574168 T 19851127; JP 26824285 A 19851128