Seal system

Details Seal system Seal system

2004-03-15

2008-11-04

Lavilla, Michael E. (Department: 1794)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S215000, C428S334000, C428S457000, C428S627000, C277S535000, C277S654000

Reexamination Certificate

active

07445854

ABSTRACT:
It is disclosed a method of deposting a seal coating and a seal system comprising at least two layers on the surface of an article. The upper or surface layer has a higher chromium activity than a bottom layer to reduce a diffusion of cobalt and the formation of cobalt oxide is reduced. The coating of invention may be heat-treated to reduce or optimize the formation of cobalt oxide to sustin the wear property.

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