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US 10,472,286 B2Granted
Yttrium aluminum garnet based thermal barrier coatings
AssigneeUniversity of Connecticut
InventorsEric H Jordan, Maurice Gell, Rishi Kumar, Chen Jiang
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Abstract
Embodiments of a microstructure that allows arrest of contaminant infiltration includes an inter layer and at least one highly reactive ceramic layer. The inter layer is not reactive to an infiltrating reactive species. The HRC layer includes materials that react with a reactive contaminant species to slow or arrest infiltration of such contaminant species.
Claims9
A microstructure to arrest contaminant infiltration comprising:
- at least one inter layer, wherein the inter layer is not reactive to an infiltrating contaminant species, wherein the inter layer comprises at least two layers of YAG;
- and
- a highly reactive ceramic layer (HRC layer), wherein the HRC layer comprises materials that react with the infiltrating contaminant species to slow or arrest infiltration of the infiltrating contaminant species, wherein the HRC layer comprises:
- a layer comprising Y2O3 between the at least two layers of YAG;
- and
- a layer comprising Gd2Zr2O7 between the at least two layers of YAG;
- and
- another layer of YAG between the at least two layers of YAG and also between the layers comprising Y2O3 and Gd2Zr2O7.
5 more elements
A microstructure to arrest contaminant infiltration comprising:
- at least one inter layer, wherein the inter layer is not reactive to an infiltrating contaminant species, wherein the inter layer comprises layers of YAG;
- and
- a highly reactive ceramic layer (HRC layer), wherein the HRC layer comprises materials that react with the infiltrating contaminant species to slow or arrest infiltration of the infiltrating contaminant species, wherein the HRC layer comprises a first layer of Y2O3+Gd2Zr2O7 between layers of YAG and a second layer of Y2O3+Gd2Zr2O7 between the layers of YAG.
A microstructure to arrest contaminant infiltration, the microstructure comprising:
- a plurality of layers of YAG;
- a layer comprising Y2O3 between two of the plurality of YAG;
- and
- a layer comprising Gd2Zr2O7 between two of the layers of YAG.
1 more element
Dependencies are inferred from the claim text.