US 12,030,820 B2
High temperature fiber, method of making and high temperature fiber composites
Paul Sheedy, Bolton, CT (US); Neal Magdefrau, Tolland, CT (US); and Wayde R. Schmidt, Pomfret Center, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Aug. 9, 2019, as Appl. No. 16/536,725.
Prior Publication US 2021/0039999 A1, Feb. 11, 2021
Int. Cl. C04B 35/80 (2006.01); C04B 35/628 (2006.01); C04B 41/89 (2006.01); C04B 111/00 (2006.01)
CPC C04B 35/80 (2013.01) [C04B 35/62849 (2013.01); C04B 35/62855 (2013.01); C04B 41/89 (2013.01); C04B 2111/00379 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of making a high temperature fiber comprising:
chemically bonding material to a fiber template at a first temperature to form a precursor fiber, the material bonded to the fiber template having a thickness greater than a radius of the fiber template; and
processing the precursor fiber at a second temperature to form the high temperature fiber;
wherein the first temperature does not equal the second temperature, and the first temperature is 250° C. to 500° C.;
wherein the high temperature fiber is a fiber which maintains shape and integrity at temperatures greater than or equal to 800° C.; and
wherein processing the precursor fiber to form the high temperature fiber further comprises additional chemical reactions, alterations to microstructure, alterations to crystalline phases, alterations to grain size, or combinations thereof;
wherein the fiber template comprises aluminum oxide, zirconium oxide, yttrium oxide, titanium dioxide, mullite, aluminosilicate, zirconium oxide, yttrium aluminum garnet, SiC, SiNC, SiOC, SiCNO, SiBCN, BN, Si3N4, SiAlCN, SiC/AlN, geopolymers, basalt, a carbide such as boron carbide, HfC, ZrC, S-glass, E-glass, A-glass, D-glass, silica, and combinations thereof.