US 11,919,820 B2
Microstructured fiber interface coatings for composites
Richard Wesley Jackson, Mystic, CT (US); Ying She, Rocky Hill, CT (US); and Gajawalli V. Srinivasan, South Windsor, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX CORPORATION, Farmington, CT (US)
Filed on Jan. 30, 2023, as Appl. No. 18/161,343.
Application 18/161,343 is a continuation of application No. 16/678,852, filed on Nov. 8, 2019, granted, now 11,565,977.
Prior Publication US 2023/0167030 A1, Jun. 1, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C04B 35/80 (2006.01); C04B 35/628 (2006.01); C23C 16/32 (2006.01); C23C 16/56 (2006.01); D06M 11/74 (2006.01); D06M 11/79 (2006.01)
CPC C04B 35/80 (2013.01) [C04B 35/62849 (2013.01); C04B 35/62863 (2013.01); C04B 35/62884 (2013.01); C04B 35/62894 (2013.01); C04B 35/62897 (2013.01); C23C 16/325 (2013.01); C23C 16/56 (2013.01); D06M 11/74 (2013.01); D06M 11/79 (2013.01); C04B 2235/5228 (2013.01); C04B 2235/5232 (2013.01); C04B 2235/524 (2013.01); C04B 2235/5244 (2013.01)] 13 Claims
OG exemplary drawing
 
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.