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AssigneeRaytheon Technologies Corporation
InventorsPaul Sheedy, Neal Magdefrau, Wayde R. Schmidt
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Disclosed is a method of coating a high temperature fiber including depositing a base material on the high temperature fiber using atomic layer deposition, depositing an intermediate material precursor on the base material using molecular layer deposition, depositing a top material on the intermediate material precursor or the intermediate layer using atomic layer deposition, and heat treating the intermediate precursor. The intermediate material in the final coating includes a structural defect, has lower density than the top material or a combination thereof. Also disclosed are the coated high temperature fiber and a composite including the high temperature fiber.
A coated high temperature fiber comprising a multi-material coating on the high temperature fiber wherein the multi-material coating has a base material in contact with the high temperature fiber, an intermediate material in contact with the base material and a top material in contact with the intermediate material and further wherein the intermediate material comprises a structural defect, has a lower density than the top material or a combination thereof.
A composite comprising a coated high temperature fiber disposed in a matrix wherein the coated high temperature fiber has a multi-material coating on the high temperature fiber and the multi-material coating has a base material in contact with the high temperature fiber, an intermediate material in contact with the base material and a top material in contact with the intermediate material and further wherein the intermediate material has a structural defect, has lower density than the top material, or a combination thereof.
Dependencies are inferred from the claim text.