公开(公告)号：UA65619C2

公开(公告)日：2004-04-15

申请号：UA2000127358

申请日：2000-12-20

Applicant: UNITED TECHNOLOGIES CORP

Inventor： ALLEN WILLIAM PATRICK ,  OLSON WALTER E ,  SHAKH DILIP M ,  SITEL ALAN DAVID

IPC: C23C14/00 ,  C23C14/04 ,  F01D5/00 ,  F01D5/12 ,  F01D5/28 ,  F02C7/30 ,  G06F9/24 ,  G06F15/177

Abstract: A turbine blade for a gas-turbine engine has a nib, a tail element and a band shelf placed between the nib and the tail element. The band shelf has the lower side adjoining the tail element of the journal, this can be between the band shelf and the tail element. The corrosion stable over-layer coating, like îCrÇl, or aluminide including noble metal, or ceramics, this inhibits corrosion, are applied to the parts of the blade that previously have not been covered with such coatings, for instance, to the lower side of the shelf and the journal of the blade. The coating applied prevents corrosion of the blade and crack formation resulting from corrosion under tension in those places. In the cases when the nib is as well covered with coating the nib coating cam be of composition differing from the composition of the coating on the surfaces under the band shelf.