Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Reexamination Certificate
2005-11-30
2010-10-05
Padgett, Marianne L (Department: 1715)
Coating processes
Direct application of electrical, magnetic, wave, or...
Pretreatment of substrate or post-treatment of coated substrate
C427S532000, C427S539000, C427S576000, C427S376200, C427S376300, C427S376400, C427S377000, C427S383300, C427S383700, C427S419300
Reexamination Certificate
active
07807231
ABSTRACT:
A process for protecting a thermal barrier coating (TBC) on a component used in a high-temperature environment, such as the hot section of a gas turbine engine. The process applies a protective film on the surface of the TBC to resist infiltration of contaminants such as CMAS that can melt and infiltrate the TBC to cause spallation. The process generally entails applying to the TBC surface a metal composition containing at least one metal whose oxide resists infiltration of CMAS into the TBC. The metal composition is applied so as to form a metal film on the TBC surface and optionally to infiltrate porosity within the TBC beneath its surface. The metal composition is then converted to form an oxide film, with at least a portion of the oxide film forming a surface deposit on the TBC surface.
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Gorman Mark Daniel
Nagaraj Bangalore Aswatha
Schafrik Robert Edward
General Electric Company
Hartman Domenica N. S.
Hartman Gary M.
Padgett Marianne L
William Scott Andes
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