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US 12,104,503 B2Granted
Environmental barrier coating
AssigneeRtx Corporation
InventorsRichard Wesley Jackson, Xia Tang, James T. Beals, Gajawalli V. Srinivasan, William K. Tredway
Life of this patent
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Abstract
An article includes a substrate and a barrier layer on the substrate. The barrier layer includes a matrix, diffusive particles dispersed in the matrix, and gettering particles dispersed in the matrix. The gettering particles include at least one alloyed metal silicide. A composite material and a method of fabricating an article are also disclosed.
Claims18
An article comprising:
- a substrate;
- and
- a barrier layer on the substrate, the barrier layer including a matrix, diffusive particles dispersed in the matrix, and gettering particles dispersed in the matrix, wherein the diffusive particles comprise at least one of barium-magnesium alumino-silicate particles, calcium alumino-silicate particles, yttrium alumino-silicate particles, ytterbium alumino-silicate particles, borosilicate glass particles, refractory metal boride particles, hafnium diboride particles, zirconium diboride particles, or titanium diboride particles, the gettering particles include at least one alloyed metal silicide, wherein the matrix is SiO2, and wherein the at least one alloyed metal silicide has first and second different metal components, and the first and second different metal components have a lower oxygen affinity than silicon affinity.
An composite material, comprising:
- a SiO2 matrix,
- diffusive particles dispersed in the matrix, wherein the diffusive particles provide self-healing to the composite material, wherein the diffusive particles comprise at least one of barium-magnesium alumino-silicate particles, calcium alumino-silicate particles, yttrium alumino-silicate particles, ytterbium alumino-silicate particles, borosilicate glass particles, refractory metal boride particles, hafnium diboride particles, zirconium diboride particles, or titanium diboride particles;
- and
- gettering particles dispersed in the matrix, wherein the gettering particles include at least one alloyed metal silicide, wherein the at least one alloyed metal silicide has first and second different metal components, the first and second different metal components have a lower oxygen affinity than silicon affinity, and wherein the gettering particles inhibit the infiltration of oxidants through the composite material.
1 more element
A method of fabricating an article, comprising:
- applying a slurry containing diffusive particles, gettering particles, and a SiO2 matrix material in a carrier fluid to a substrate, wherein the diffusive particles comprise at least one of barium-magnesium alumino-silicate particles, calcium alumino-silicate particles, yttrium alumino-silicate particles, ytterbium alumino-silicate particles, borosilicate glass particles, refractory metal boride particles, hafnium diboride particles, zirconium diboride particles, or titanium diboride particles, and wherein the gettering particles include at least one alloyed metal silicide, wherein the at least one alloyed metal silicide has first and second different metal components, and the first and second different metal components have a lower oxygen affinity than silicon affinity;
- and
- sintering the slurry to form a barrier layer.
Dependencies are inferred from the claim text.