C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 1/00 (2006.01) C23C 24/00 (2006.01)
Patent
CA 2711347
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.
Boutwell Brett Allen
Kirby Glen Harold
Company General Electric
Craig Wilson And Company
LandOfFree
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