Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Methods for making water based 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, and 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 or the compliant layer slurry, to the component (10); drying the component; infiltrating a sol-gel solution comprising an aqueous solution of a water soluble salt sintering aid, or an organic solvent solution of a solvent soluble salt sintering aid into the applied slurry layers; and sintering the component to produce the environmental barrier coating (12) having at least the bond coat layer (14), a transition layer (16) and any one or more of an outer layer (20) or a compliant layer (18) wherein during sintering a reaction between the primary materials and the 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 water based 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, and 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 or the compliant layer slurry, to the component (10); drying the component; infiltrating a sol-gel solution comprising an aqueous solution of a water soluble salt sintering aid, or an organic solvent solution of a solvent soluble salt sintering aid into the applied slurry layers; and sintering the component to produce the environmental barrier coating (12) having at least the bond coat layer (14), a transition layer (16) and any one or more of an outer layer (20) or a compliant layer (18) wherein during sintering a reaction between the primary materials and the 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 water based environmental barrier coatings using sintering aids
Verfahren zur Herstellung von wasserbasierten Umgebungsschutzschichten mit sinterungsfördernden Zusätzen
Procédés de fabrication de revêtements de barrière environnementale à base d'eau utilisant des supports de frittage
KIRBY GLEN HAROLD (Autor:in) / BOUTWELL BRETT ALLEN (Autor:in) / SUBIT JESSICA L (Autor:in)
11.01.2023
Patent
Elektronische Ressource
Englisch
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