High temperature amorphous composition based on aluminum phosphate
AssigneeApplied Thin Films, Inc.
InventorsSankar Sambasivan, Kimberly Ann Steiner
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Abstract
A composition providing thermal, corrosion, and oxidation protection at high temperatures is based on a synthetic aluminum phosphate, in which the molar content of aluminum is greater than phosphorous. The composition is annealed and is metastable at temperatures up to 1400° C.
Claims21
A high temperature stable composition comprising an aluminum phosphate material wherein said aluminum phosphate material has a ratio of aluminum to phosphorous greater than one-to-one, said composition being annealed and characterized by containing at least 50 percent by weight of an amorphous content, said amorphous content of said composition metastable at 1400° C.
An aluminum phosphate composition, said composition comprising an aluminum phosphate material wherein said aluminum phosphate material has an amount of aluminum relative to phosphorous exceeding five percent, said composition metastable at 1400° C.
A method for protecting a substrate from corrosion and oxidation at elevated temperatures, said method comprising the steps of applying a precursor solution to said substrate, said precursor solution comprising the admixture of a phosphorous pentoxide alcoholic solution and an aluminum salt alcoholic solution, wherein the ratio of aluminum to phosphorous is greater than one to one, and thereafter drying said solution and annealing on said substrate.
A high temperature stable composition comprising an aluminum phosphate material wherein said aluminum phosphate material has a ratio of aluminum to phosphorous greater than one to one, said composition being annealed and characterized by containing at least 50% by weight of an amorphous content, said amorphous content of said composition metastable at a temperature from ambient up to about 1400° C., said composition on a substrate.
Dependencies are inferred from the claim text.