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Thermal barrier coating resistant to sintering

United States Patent

March 20, 2001
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A device (10) having a ceramic thermal barrier coating layer (16) characterized by a microstructure having gaps (18) with a sintering inhibiting material (22) disposed on the columns (20) within the gaps (18). The sintering resistant material (22) is stable over the range of operating temperatures of the device (10) and is not soluble with the underlying ceramic layer (16). For a YSZ ceramic layer (16) the sintering resistant layer (22) may preferably be aluminum oxide or yttrium aluminum oxide, deposited as a continuous layer or as nodules.
Subramanian; Ramesh (Orlando, FL), Sabol; Stephen M. (Orlando, FL)
Siemens Westinghouse Power Corporation (Orlando, FL)
09/ 245,262
February 5, 1999
This invention was made with U.S. Government support under contract number DE-AC05-95OR22242 awarded by the Department of Energy. The Government has certain rights in this invention.