US 11,891,728 B2
SiC/ZrC composite fiber, preparation method and use thereof
Xiaofei Wang, Shenzhen (CN); Mingyu Zhu, Shenzhen (CN); Yulei Li, Shenzhen (CN); Fuzeng Ren, Shenzhen (CN); and Yusheng Zhao, Shenzhen (CN)
Assigned to Southern University of Science and Technology, Shenzhen (CN)
Filed by SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shenzhen (CN)
Filed on Jul. 27, 2020, as Appl. No. 16/939,684.
Claims priority of application No. 201911355624.4 (CN), filed on Dec. 25, 2019.
Prior Publication US 2021/0198815 A1, Jul. 1, 2021
Int. Cl. C04B 35/622 (2006.01); D01F 8/18 (2006.01); C04B 35/56 (2006.01); C04B 35/571 (2006.01); D01D 5/00 (2006.01); D01F 1/10 (2006.01); D01F 9/08 (2006.01)
CPC D01F 8/18 (2013.01) [C04B 35/5622 (2013.01); C04B 35/571 (2013.01); C04B 35/62277 (2013.01); D01D 5/003 (2013.01); D01F 1/10 (2013.01); D01F 9/08 (2013.01); C04B 2235/483 (2013.01); C04B 2235/5244 (2013.01); C04B 2235/5264 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A preparation method of a SiC/ZrC composite fiber having a diameter of 10 to 70 μm, comprising steps of:
(1) under protection of an inert atmosphere, mixing liquid polycarbosilane with a zirconium-containing polymer to obtain a hybrid spinning solution, and performing electrospinning to obtain a SiC/ZrC composite fiber precursor; and
(2) crosslinking and thermally treating the SiC/ZrC composite fiber precursor obtained in step (1) in a protective atmosphere to obtain the SiC/ZrC composite fiber;
wherein the hybrid spinning solution in step (1) has a viscosity of from about 0.5 Pa·s to about 10 Pa·s;
wherein an injection flow rate for the electrospinning in step (1) is from about 1 mL/h to about 5 mL/h;
wherein a fiber collecting distance for the electrospinning in step (1) is from about cm to about 20 cm;
wherein the electrospinning in step (1) is for a period of from about 1 hour to about hours;
wherein a heating rate for the crosslinking in step (2) is from about 1° C./min to about 5° C./min;
wherein a temperature for the crosslinking in step (2) is from about 100° C. to about 180° C.;
wherein the crosslinking in step (2) is for a period of from about 1 hour to about 5 hours;
wherein a temperature for the thermal treatment in step (2) is from about 1300° C. to about 1800° C.;
wherein a heating rate for the thermal treatment in step (2) is from about 1° C./min to about 15° C./min; and
wherein the thermal treatment in step (2) is for a period of from about 1 hour to about 5 hours.