The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2003
Filed:
Apr. 25, 2002
Reinhard Fried, Nussbaumen, CH;
Alstom (Switzerland) Ltd., Baden, CH;
Abstract
The invention relates to a gas turbine seal, comprising a metallic component ( ) with a durable or erosion-resistant ceramic coating ( ) and an abradable ceramic layer ( ) which is arranged thereon in locally delimited fashion, a bond layer ( ) being arranged on the surface ( ) of the metallic component ( ), to which bond layer the durable or erosion-resistant ceramic coating ( ) is applied as a covering layer. The invention is characterized in that the bond layer ( ) comprises separate, adjacent spherical rivets ( ) or mushroom-shaped rivets ( ) which have a web ( ) and a head ( ). These rivets form individual metal islands with numerous undercuts ( ), around which there is a continuous ceramic network. It is possible to produce very thick layers which have a good bond strength, the ceramic not being flaked away even in the event of introduction of radial/tangential forces, sickle-shaped contact or locally high overheating/frictional heat, and a good sealing action being achieved.