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Method for making solvent based environmental barrier coatings using sintering aids
A method for making an environmental barrier coating (12) using a sintering aid comprising: combining at least an organic solvent, 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 an organic solvent, 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 an organic solvent, 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 a component (10); 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 (10) to produce the environmental barrier coating having at least a transition layer (16) and any one or more of an outer layer (20) or a (18) compliant layer 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.
Method for making solvent based environmental barrier coatings using sintering aids
A method for making an environmental barrier coating (12) using a sintering aid comprising: combining at least an organic solvent, 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 an organic solvent, 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 an organic solvent, 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 a component (10); 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 (10) to produce the environmental barrier coating having at least a transition layer (16) and any one or more of an outer layer (20) or a (18) compliant layer 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.
Method for making solvent based environmental barrier coatings using sintering aids
Verfahren zur Herstellung von lösungsmittelbasierten Umgebungsschutzschichten mit sinterungsfördernden Zusätzen
Procédé de fabrication de revêtements de barrière environnementale à base de solvants utilisant des supports de frittage
KIRBY GLEN HAROLD (author) / BOUTWELL BRETT ALLEN (author)
2015-11-04
Patent
Electronic Resource
English
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