Stock material or miscellaneous articles – Composite – Of silicon containing
Reexamination Certificate
2011-04-05
2011-04-05
McNeil, Jennifer C (Department: 1784)
Stock material or miscellaneous articles
Composite
Of silicon containing
C428S448000, C428S701000, C427S372200, C416S24100B, C416S24100B
Reexamination Certificate
active
07919187
ABSTRACT:
A protective coating for use on a silicon-containing substrate, and deposition methods therefor. The coating has a strontium-aluminosilicate (SAS) composition that is less susceptible to degradation by volatilization and in corrosive environments as a result of having at least an outer surface region that consists essentially of one or more stoichiometric crystalline phases of SAS and is substantially free of a nonstoichiometric second crystalline phase of SAS that contains a substoichiometric amount of silica. The coating can be produced by carrying out deposition and heat treatment steps that result in the entire coating or just the outer surface region of the coating consisting essentially of the stoichiometric celsian phase.
REFERENCES:
patent: 6254935 (2001-07-01), Eaton et al.
patent: 6299988 (2001-10-01), Wang et al.
patent: 6352790 (2002-03-01), Eaton et al.
patent: 2005/0238888 (2005-10-01), Spitsberg et al.
Hazel Brian Thomas
Spitsberg Irene
Walston Christine
Andes William Scott
General Electric Company
Hartman Domenica N. S.
Hartman Gary M.
Katz Vera
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