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Method for improving mechanical property of silicon carbide fiber through negative pressure presintering
A method for improving mechanical properties of silicon carbide fibers through negative pressure presintering comprises the following steps: reacting PDMS in an inert atmosphere to obtain PCS, performing melt spinning under the protection of the inert atmosphere to obtain PCS fibril, performing electron beam irradiation crosslinking treatment in the inert atmosphere to obtain PCS crosslinked fibers, and presintering in a low-pressure inert atmosphere to obtain silicon carbide presintered fibers. Performing continuous final sintering in an inert atmosphere to obtain silicon carbide fibers; in the pre-sintering process of the PCS cross-linked fibers, pyrolysis byproducts generated in the pre-sintering process of the fibers are removed by a method of maintaining the system pressure in a negative pressure state, so that the problems that the fibers are easy to break and the pyrolysis byproducts are difficult to remove in a traditional method are solved; the silicon carbide fiber prepared by the method has excellent mechanical properties and high temperature resistance; the method is simple to operate and beneficial to industrial production.
一种通过负压预烧提升碳化硅纤维力学性能的方法，包含如下步骤：将PDMS在惰性气氛下反应，得PCS，在惰性气氛保护下熔融纺丝，得PCS原纤维，在惰性气氛下电子束辐照交联处理，得PCS交联纤维，在低压的惰性气氛下预烧结，得到碳化硅预烧纤维，在惰性气氛下连续终烧，得碳化硅纤维；本发明在PCS交联纤维预烧过程中，通过将体系压力维持在负压状态的方法，排除纤维预烧过程中产生的热解副产物，解决了传统方法易于断丝和热解副产物难于排除的问题；本发明方法制备的碳化硅纤维具有优异的力学性能和耐高温性能；本发明方法操作简单，利于工业化生产。
Method for improving mechanical property of silicon carbide fiber through negative pressure presintering
A method for improving mechanical properties of silicon carbide fibers through negative pressure presintering comprises the following steps: reacting PDMS in an inert atmosphere to obtain PCS, performing melt spinning under the protection of the inert atmosphere to obtain PCS fibril, performing electron beam irradiation crosslinking treatment in the inert atmosphere to obtain PCS crosslinked fibers, and presintering in a low-pressure inert atmosphere to obtain silicon carbide presintered fibers. Performing continuous final sintering in an inert atmosphere to obtain silicon carbide fibers; in the pre-sintering process of the PCS cross-linked fibers, pyrolysis byproducts generated in the pre-sintering process of the fibers are removed by a method of maintaining the system pressure in a negative pressure state, so that the problems that the fibers are easy to break and the pyrolysis byproducts are difficult to remove in a traditional method are solved; the silicon carbide fiber prepared by the method has excellent mechanical properties and high temperature resistance; the method is simple to operate and beneficial to industrial production.
一种通过负压预烧提升碳化硅纤维力学性能的方法，包含如下步骤：将PDMS在惰性气氛下反应，得PCS，在惰性气氛保护下熔融纺丝，得PCS原纤维，在惰性气氛下电子束辐照交联处理，得PCS交联纤维，在低压的惰性气氛下预烧结，得到碳化硅预烧纤维，在惰性气氛下连续终烧，得碳化硅纤维；本发明在PCS交联纤维预烧过程中，通过将体系压力维持在负压状态的方法，排除纤维预烧过程中产生的热解副产物，解决了传统方法易于断丝和热解副产物难于排除的问题；本发明方法制备的碳化硅纤维具有优异的力学性能和耐高温性能；本发明方法操作简单，利于工业化生产。
Method for improving mechanical property of silicon carbide fiber through negative pressure presintering
一种通过负压预烧提升碳化硅纤维力学性能的方法
ZHANG YUJIE (Autor:in) / WANG HAO (Autor:in) / CHENG HONGMEI (Autor:in) / MA ZHONGLIE (Autor:in) / MA SHENG (Autor:in) / CHEN SONG (Autor:in) / ZENG YI (Autor:in)
12.01.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
D01D
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
,
Mechanische Verfahren oder Vorrichtungen für die Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
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D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
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Silicon Carbide Fiber Reinforced Recrystallized Silicon Carbide
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