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

Claim 0:
1. A fibrous ceramic preform comprising:
a plurality of ceramic fibers;
a first amorphous layer deposited on each of the plurality of ceramic fibers; and
a boron-based interfacial coating layer deposited on the first amorphous layer such 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, each of the interfacial coating layers comprising:
an anisotropic region adjacent 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.