CMAS-Protective Coating Infiltrants
AssigneeRtx Corporation
InventorsAndrew Douglas Spaeth, Richard Wesley Jackson, III, James T. Beals, Tianli Zhu
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Abstract
A method for protecting a coated substrate having a porous ceramic barrier coating includes applying a molten salt to the ceramic barrier coating. The salt is selected from the group consisting of one or more acetates and/or nitrates. The molten salt is infiltrated into porosity of the ceramic barrier coating. The infiltrated molten salt is solidified. The solidified salt is sintered.
Claims20
A method for protecting a coated substrate having a porous ceramic barrier coating, the method comprising:
- applying a molten salt to the ceramic barrier coating, the salt selected from the group consisting of:
- one or more acetates and/or nitrates;
- infiltrating the molten salt into porosity of the ceramic barrier coating;
- solidifying the infiltrated molten salt;
- and
- sintering the solidified salt.
A coated article comprising:
- a substrate;
- one or more layers of ceramic coating material having porosity;
- and
- a filler in the porosity comprising lanthana and zirconia.
A method for protecting a coated substrate having a porous ceramic barrier coating, the method comprising:
- placing the coated substrate in a vessel;
- drawing vacuum from and/or adding pressure to the vessel;
- infiltrating into the porosity, a melt comprising a molten salt;
- solidifying the infiltrated molten salt;
- and
- sintering the solidified salt so as to oxidize and liberate carbon and/or nitrogen.
Dependencies are inferred from the claim text.