An amorphous SiC-based fiber was successfully prepared by the preceramic polymer route from a boron-modified polytitanocarbosilane. It was found that the addition of titanium and boron had adverse effect on melt-spinning, while the tensile strength of the obtained SiC-based fibers increased with the contents of titanium and boron increasing. It is worth mentioning that the decomposition of SiCO phase and the resultant β-SiC crystallization were retarded by the incorporation of titanium and boron into the SiC-based fiber.

中文翻译：

---

硼改性的聚钛碳碳硅烷前体的非晶细径SiC基纤维

通过陶瓷前体聚合物路线，成功地从硼改性的聚钛碳碳硅烷制备了无定形SiC基纤维。发现钛和硼的添加对熔体纺丝有不利影响，而所得的SiC基纤维的拉伸强度随着钛和硼的含量的增加而增加。值得一提的是，通过将钛和硼掺入SiC基纤维中，可阻止Si C O相的分解和所得的β-SiC结晶。