(19)
(11)EP 2 011 777 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
01.05.2013 Bulletin 2013/18

(43)Date of publication A2:
07.01.2009 Bulletin 2009/02

(21)Application number: 08158135.7

(22)Date of filing:  12.06.2008
(51)Int. Cl.: 
C04B 41/85  (2006.01)
C23C 4/10  (2006.01)
C04B 41/89  (2006.01)
F01D 5/28  (2006.01)
(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30)Priority: 26.06.2007 US 768467

(71)Applicant: GENERAL ELECTRIC COMPANY
Schenectady, NY 12345 (US)

(72)Inventors:
  • Sarrafi-Nour, Reza
    Clifton Park, NY 12065 (US)
  • Luthra, Krishan Lal
    Niskayuna, NY 12309 (US)
  • Meschter, Peter Joel
    Niskayuna, NY 12309 (US)
  • Johnson, Curtis Alan
    Niskayuna, NY 12309 (US)

(74)Representative: Szary, Anne Catherine 
London Patent Operation GE International Inc. 15 John Adam Street
London WC2N 6LU
London WC2N 6LU (GB)

  


(54)Articles for high temperature service and methods for their manufacture


(57) An article (200) for use in aggressive environments is presented. In one embodiment, the article (200) comprises a substrate (202) and a self-sealing and substantially hermetic sealing layer (210) disposed over a bondcoat (204). The substrate (202) may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such an article is also presented. The method comprises providing a substrate (202); disposing a self-sealing layer (210) over the substrate (202); and heating the sealing layer (210) to a sealing temperature at which at least a portion of the sealing layer (210) will flow.