Global Patent Index - EP 0185603 A1

EP 0185603 A1 19860625 - Improved durability metallic-ceramic turbine air seals.

Title (en)

Improved durability metallic-ceramic turbine air seals.

Title (de)

Verbesserung der Lebensdauer von metallvulkanischen Turbinenabdichtungen.

Title (fr)

Amélioration de la résistance à l'usure d'un joint d'étanchéité d'une turbine constitué d'un matériau métal céramique.

Publication

EP 0185603 A1 19860625 (EN)

Application

EP 85630204 A 19851127

Priority

US 67579784 A 19841128

Abstract (en)

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

C23C 4/10

IPC 8 full level

C23C 4/02 (2006.01); C23C 4/06 (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 (search report)

  • [X] FR 918141 A 19470130 - BBC BROWN BOVERI & CIE
  • [A] WO 8201898 A1 19820610 - CASTOLIN SA [CH], et al
  • [AD] US 3091548 A 19630528 - DILLON II HAROLD PHILLIPS
  • [A] US 3758233 A 19730911 - NEWMAN R, et al
  • [A] FR 2190754 A1 19740201 - ASAHI GLASS CO LTD [JP]
  • [XP] CH 648358 A5 19850315 - CASTOLIN SA
  • [X] PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 139 (C-171)[1284], 17th June 1983; & JP - A - 58 52 469 (NIPPON KOKAN K.K.) 28-03-1983
  • [A] PATENTS ABSTRACTS OF JAPAN, vol. 4, no. 174, 2nd December 1980; & JP - A - 55 113 880 (TOKYO SHIBAURA DENKI K.K.) 02-09-1980
  • [A] SOVIET POWDER METALLURGY AND METAL CERAMICS, vol. 11, no. 3, March 1972, page 253, Consultants Bureau, New York, US; D.M. KARPINOS et al.: "Improving the adhesion of plasma-sprayed coatings to articles"

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