Patent ID: 11919820
Assignee: RTX CORPORATION
Field: nan (nan)
Classification: CPC nan | IPC C  D

Claim 0:
1. A coated ceramic fiber comprising:
a first silicon carbide coating layer adjacent to the ceramic fiber, wherein a portion of the first silicon carbide layer is oxidized to form amorphous silicon dioxide;
a silicon dioxide coating layer adjacent to the first silicon carbide coating layer, wherein the silicon dioxide coating layer includes the amorphous silicon dioxide; and
an additional coating layer adjacent to the silicon dioxide coating layer;
wherein the additional coating layer adjacent to the silicon dioxide coating layer includes silicon carbide and is opposedly disposed on a surface of the silicon dioxide from the surface that contacts the first silicon carbide coating,
wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation, and
wherein the silicon dioxide coating layer includes silicon dioxide in β cristobalite form which forms micro cracks after transforming to α cristobalite form.