US 12,410,107 B2
Nanolaminate fiber interface coatings for composites
Neal Magdefrau, Tolland, CT (US); and Paul Sheedy, Bolton, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Apr. 20, 2018, as Appl. No. 15/958,119.
Prior Publication US 2019/0322595 A1, Oct. 24, 2019
Int. Cl. C04B 41/45 (2006.01); C04B 35/76 (2006.01); C04B 35/82 (2006.01); C04B 41/52 (2006.01)
CPC C04B 41/4584 (2013.01) [C04B 35/76 (2013.01); C04B 35/82 (2013.01); C04B 41/52 (2013.01); C04B 2235/5212 (2013.01); C04B 2235/5216 (2013.01); C04B 2237/704 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A multi nanolayer interface coating for a fiber of a composite comprising:
a first interface coating nanolayer deposited onto the fiber of the composite, and
a second interface coating nanolayer deposited onto the first interface coating nanolayer;
a third interface coating nanolayer deposited onto the second interface coating nanolayer, and a fourth interface coating nanolayer deposited onto the third interface coating nanolayer;
wherein the first, second, third and fourth interface coating nanolayers are arranged in a consistent repeating pattern; where the first, second, third and fourth interface coating nanolayers contain a nitride, a carbide, a boride, or an oxide; where the first, second, third and fourth interface coating nanolayers are disposed on the fiber via atomic layer deposition; and
wherein the first interface coating nanolayer has the identical composition as the third interface coating nanolayer and the first interface coating nanolayer is deposited at the same deposition temperature as the third interface coating nanolayer, and the second interface coating nanolayer has the identical composition as the fourth interface coating nanolayer and the second interface coating nanolayer is deposited at the same deposition temperature as the fourth interface coating nanolayer, and the first interface coating nanolayer has a different composition than the second interface coating nanolayer, and the deposition temperature of the first interface coating nanolayer is different than the deposition temperature of the second interface coating nanolayer,
wherein the thickness of the adjacent nanolayers varies by less than an order of magnitude,
wherein the composite is a glass matrix composite, where the glass matrix composite is a borosilicate glass, an aluminosilicate glass, a high silica glass, a phosphate glass, or a combination thereof, wherein the first interface coating nanolayer has a thickness of 0.5 Angstroms to less than 25 nanometers, and wherein the second interface coating nanolayer has a thickness of 0.5 Angstroms to less than 25 nanometers.