Patent ID: 11873249
Assignee: RTX CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 11:
12. A method of forming a ceramic matrix composite, the method comprising:
forming a fibrous ceramic preform by:
arranging a plurality of ceramic fibers;
depositing a first amorphous layer on each of the plurality of ceramic fibers; and
depositing a boron-based interfacial coating layer on the first amorphous layer such that it is influenced by the first amorphous layer and further such that that the first amorphous layer of each of the plurality of ceramic fibers is disposed between a respective one of the plurality of ceramic fibers and the respective interfacial coating layer, the interfacial coating layer comprising:
an anisotropic region adjacent and promoted by the first amorphous layer, the anisotropic region comprising hexagonal boron nitride; and
an isotropic region on a side of the anisotropic region opposite the first amorphous layer.