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A platform for research: civil engineering, architecture and urbanism
Methods for making environmental barrier coatings using sintering aids
A method for making an environmental barrier coating (12) using a sintering aid comprising applying a bond coat layer (14) to a ceramic component (10); combining at least water, a primary transition material comprising a rare earth disilicate, or a doped rare earth disilicate to produce a transition layer slurry; combining at least water, and a primary outer material comprising a rare earth monosilicate or a doped rare earth monosilicate to produce an outer layer slurry; combining at least water, and a primary compliant material comprising BSAS or a rare earth doped BSAS to produce a compliant layer slurry; applying at least the transition layer slurry, and any one or more of the outer layer slurry, and the compliant layer slurry; and sintering the component to produce the environmental barrier coating (12) having at least the bond coat layer, a transition layer (16) and any of an outer layer (20) or a compliant layer (18) wherein at least one of the transition layer, the outer layer, or the compliant layer further comprises at least one slurry sintering aid and wherein a reaction between the primary materials and the slurry sintering aid results in the transition layer comprising a porosity of from 0% to about 15% by volume of the transition layer, the outer layer comprising a porosity of from 0% to about 30% by volume of the outer layer, and the compliant layer comprising a porosity of from about 0% to about 30% by volume of the compliant layer.
Methods for making environmental barrier coatings using sintering aids
A method for making an environmental barrier coating (12) using a sintering aid comprising applying a bond coat layer (14) to a ceramic component (10); combining at least water, a primary transition material comprising a rare earth disilicate, or a doped rare earth disilicate to produce a transition layer slurry; combining at least water, and a primary outer material comprising a rare earth monosilicate or a doped rare earth monosilicate to produce an outer layer slurry; combining at least water, and a primary compliant material comprising BSAS or a rare earth doped BSAS to produce a compliant layer slurry; applying at least the transition layer slurry, and any one or more of the outer layer slurry, and the compliant layer slurry; and sintering the component to produce the environmental barrier coating (12) having at least the bond coat layer, a transition layer (16) and any of an outer layer (20) or a compliant layer (18) wherein at least one of the transition layer, the outer layer, or the compliant layer further comprises at least one slurry sintering aid and wherein a reaction between the primary materials and the slurry sintering aid results in the transition layer comprising a porosity of from 0% to about 15% by volume of the transition layer, the outer layer comprising a porosity of from 0% to about 30% by volume of the outer layer, and the compliant layer comprising a porosity of from about 0% to about 30% by volume of the compliant layer.
Methods for making environmental barrier coatings using sintering aids
Verfahren zur Herstellung von Umgebungsschutzschichten mit sinterungsfördernden Zusätzen
Procédés de fabrication de revêtements de barrière environnementale utilisant des supports de frittage
KIRBY GLEN HAROLD (author) / BOUTWELL BRETT ALLEN (author) / SUBIT JESSICA L (author)
2019-10-16
Patent
Electronic Resource
English
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