Coating system including oxide nanoparticles in oxide matrix
AssigneesROLLS-ROYCE plc, Purdue Research Foundation
InventorsSungbo Shim, Sean E. Landwehr, Stephanie Gong, Jeffrey P. Youngblood, Rodney Trice
Life of this patent
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Abstract
In some examples, an article may include a substrate and a coating on the substrate. The substrate may include a superalloy, a ceramic, or a ceramic matrix composite. The coating may include a layer comprising a matrix material and a plurality of nanoparticles. The matrix material may include at least one of silica, zirconia, alumina, titania, or chromia, and the plurality of nanoparticles may include nanoparticles including at least one of yttria, zirconia, alumina, or chromia. In some examples, an average diameter of the nanoparticles is less than about 400 nm.
Claims32
An article comprising:
- a substrate;
- a coating on the substrate;
- wherein the coating comprises a layer comprising a matrix material and a plurality of nanoparticles;
- wherein the matrix material comprises at least one of silica, zirconia, alumina, titania, or chromia;
- wherein the plurality of nanoparticles comprises nanoparticles comprising at least one of yttria, zirconia, alumina, or chromia;
- and
- wherein an average diameter of the nanoparticles is less than about 400 nm.
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A system comprising:
- a first component comprising an alloy substrate;
- a second component comprising a ceramic or a CMC substrate;
- wherein at least a portion of the first component is in contact with at least a portion of the second component;
- wherein the at least a portion of the first component, the at least a portion of the second component, or both comprises a coating;
- wherein the coating comprises a layer comprising a matrix material and a plurality of nanoparticles;
- wherein the matrix material comprises at least one of silica, zirconia, alumina, titania, or chromia;
- wherein the plurality of nanoparticles comprises nanoparticles comprising at least one of yttria, zirconia, alumina, or chromia;
- and
- wherein an average diameter of the nanoparticles is less than about 400 nm.
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A method comprising:
- applying a layer of a sol comprising an oxide matrix precursor and a plurality of nanoparticles by at least one of air spraying, spin coating, or dip coating, wherein the oxide matrix precursor comprises a precursor of at least one of silica, zirconia, alumina, titania, or chromia, and wherein the plurality of nanoparticles comprise at least one of yttria, zirconia, alumina, or chromia;
- curing the layer to form a gel;
- and
- sintering the layer to form a layer comprising an oxide matrix and the plurality of nanoparticles, wherein the oxide matrix comprises at least one of silica, zirconia, alumina, titania, or chromia.
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Dependencies are inferred from the claim text.