Multi-layer coatings for reinforcements in high temperature composites
AssigneeThe Standard Oil Company
InventorsD. Lukco, M. A. Tenhover
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Abstract
The subject invention relates to a coated reinforcement material comprising a SiC reinforcement having a coating of at least three layers, wherein the layers are alternately A-material layers of the general formula: Al.sub.x O.sub.y N.sub.z wherein x is up to about 60 atomic % of the coating; y is from about 20 atomic % to about 55 atomic % of the coating; and z is from about 5 atomic % to about 45 atomic % of the coating, with the proviso that x+y+z=100, and B-material layers comprising a metal alloy, such that the first and last layers of the coating are A-material layers. The invention further relates to a high strength, high temperature performance composite containing the above-specified coated reinforcement.
Claims27
A coated reinforcement material comprising a SiC reinforcement having a coating of at least three layers, wherein said layers are alternately A-material layers and B-material layers, said A-material layers of the general formula:
- Al.sub.x O.sub.y N.sub.z
- wherein x is greater than zero to about 60 atomic percent of said A-material layer;
- y is from about 20 atomic percent to about 55 atomic percent of said A-material layer;
- and
- z is from about 5 atomic percent to about 45 atomic percent of said A-material layer, with the proviso that x+y+z=100, and said B-material layers comprising a metal alloy, such that the first and last layers of said coating are said A-material layers, and wherein said B-material layers have a lower Young's modulus than said SiC reinforcement.
A high strength, high temperature performance composite comprising a SiC reinforcement material having an at least three layer coating, wherein said layers alternately comprise A-material layers of aluminum, oxygen and nitrogen, and B-material layers of metal alloys, such that the first and last layers of said coating are said A-material layers, said coated SiC reinforcement material being incorporated in a matrix material selected from the group consisting of ceramic, glass and intermetallic, and wherein said B-material layers have a lower Young's modulus than either said SiC reinforcement and said matrix material.
Dependencies are inferred from the claim text.