Characterization of SiC Fiber Derived from Polycarbosilanes with Controlled Molecular Weight

被引：15

作者：

Shin, Dong-Geun ^{[1
]}

Riu, Doh-Hyung ^{[1
]}

Kim, Younghee ^{[2
]}

Kim, Hyung-Rae ^{[2
]}

Park, Hong-Sik ^{[3
]}

Kim, Hyoun-Ee ^{[4
]}

机构：

[1] KICET, Nano Mat Team, Seoul 153801, South Korea

[2] KICET, Eco Mat Team, Seoul 153801, South Korea

[3] DACC Ltd, Gyeongsangnam Do 641120, South Korea

[4] Seoul Natl Univ, Sch Mat Sci Engn, Seoul 151742, South Korea

来源：

JOURNAL OF THE KOREAN CERAMIC SOCIETY | 2005年 / 42卷 / 08期

关键词：

SiC fiber; Polycarbosilane; Zeolite; Melt-spinning; Polymerization;

D O I：

10.4191/kcers.2005.42.8.593

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polycarbosilane was synthesized by the Kumada rearrangement of polydimethylsilane in the presence of zeolite (ZSM-5) as a catalyst at 350 degrees C. The prepared polycarbosilane had very low molecular weight (M-w=500), so that it was not suitable to fabricate SiC fiber by melt spinning. Further polymerization of PCS was conducted around 400 degrees C to obtain spinnable polycarbosilane. After polymerization, the polycarbosilanes were isolated by distillation according to the molecular weight distributions. The PCS with a controlled molecular weight distribution was spun into continuous polycarbosilane green fibers. The PCS green fiber was successfully transformed into silicon oxycarbide fiber. The room temperature strength of the SiC fiber was around 1.5 - 1.8 GPa. The oxidation behavior and the tensile strength after oxidation were also evaluated.

引用

页码：593 / 598

页数：6