Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1998-01-26
1999-11-16
Beck, Shrive
Coating processes
With post-treatment of coating or coating material
Heating or drying
4273762, 427379, 4274193, 4274194, B05D 302, B05D 308, B05D 138
Patent
active
059853689
ABSTRACT:
An improved thermal barrier coating for metal substrates such as superalloys is disclosed. The coating is a slurry composition, comprising spheres of zirconia, at least some of which are hollow, contained within a porous oxide matrix, such as aluminosilicate. The slurry composition can be applied by slurry casting or similar techniques to the desired surface. Coating methods are also described. In general, they involve the application of successive layers of variations of the slurry composition, with various curing techniques used between layers and after the final coating is applied. Another embodiment of this invention embraces a composite coating, comprising (i) an oxide matrix phase; (ii) zirconia spheres embedded in the oxide matrix; and (iii) a porous phase.
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McAtee Daniel Scott
Nagaraj Bangalore Aswatha
Sangeeta D.
Spiro Clifford Lawrence
Szala Lawrence Edward
Barr Michael
Beck Shrive
General Electric Co.
Johnson Noreen C.
Stoner Douglas E.
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