Thermal barrier coating resistant to sintering
AssigneeSiemens Westinghouse Power Corporation
InventorsRamesh Subramanian, Stephen M. Sabol
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Abstract
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.
Claims10
A device operating over a range of temperatures and having a thermal barrier coating on at least a portion of its surface, the device comprising:
- a substrate;
- a ceramic layer disposed on said substrate, said ceramic layer having a microstructure wherein a plurality of gaps extend from an outer surface of said ceramic layer toward said substrate;
- and
- a sintering inhibiting material comprising a material selected from the group consisting of aluminum oxide and yttrium aluminum oxide disposed within said gaps.
A device operating over a range of temperatures and having a thermal barrier coating on at least a portion of its surface, the device comprising:
- a substrate;
- a ceramic layer disposed on said substrate, said ceramic layer having a microstructure wherein a plurality of gaps extend from an outer surface of said ceramic layer toward said substrate;
- and
- a sintering inhibiting material is disposed as a plurality of nodules within said gaps.
Dependencies are inferred from the claim text.