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 |
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.
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