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US 2007/0117484 A1Published application
Multilayered boron nitride/silicon nitride fiber coatings
AssigneeUnited Technologies Corporation
InventorMichael Kmetz
Life of this patent
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Abstract
A composite is described which has particular utility in the formation of components for gas turbine engines. The composite broadly comprises a substrate having a surface and at least one layer of a BN/Si3N4 coating on the substrate surface. The coating preferably is formed by alternative layers of a BN material and a Si3N4 material. The substrate may be a cloth material with fibers, such as SiC fibers, woven therein.
Claims19
A method for forming a coating comprising the steps of:
- placing a substrate in a reaction chamber;
- heating the substrate to a deposition temperature;
- forming at least one coating layer on said substrate;
- and
- said forming step comprising introducing ammonia and nitrogen into said reaction chamber, introducing a boron halogen precursor into said reaction chamber, stopping the flow of said boron halogen precursor, and introducing a silicon halogen precursor into said reaction chamber.
2 more elements
A system for forming a coating on a substrate, comprising:
- a reaction chamber for holding said substrate to be coated;
- and
- means for forming a multilayered BN/Si3N4 coating on said substrate.
A composite comprising:
- a substrate having a surface;
- and
- at least one layer of a BN/Si3N4 coating on said substrate surface.
Dependencies are inferred from the claim text.