氧含量对Co-SiC纤维结构与性能的影响

The influence of oxygen content on the structure and properties of Co-SiC fibers

系统研究了含钴聚碳硅烷交联丝的氧含量对所成含钴碳化硅（Co-SiC）纤维结构与性能的影响。研究结果显示，较之交联丝Co-PCS-air，Co-PCS-02的氧含量较高，陶瓷产率较高，所成纤维的SiCx0y相含量较高、β-SiC和CoSi晶粒的增长速度较快，晶粒的尺寸较大，达到最大力学性能的烧结温度较低，电阻率也较低。该纤维电阻率在1O^0～10^3Ω·CITl之间可调，且具有一定的磁性，有望用作吸波纤维。

In this work, it was systematically studied that how oxygen content of cured cobalt-containing polycar- bosilance （PCS） fibers influences the structure and properties of cobalt-containing silicon carbide（Co-SiC） fi- bers. Compared to cured Co-PCS-air fibers, Co-PCS-O2 fibers have a higher oxygen content and higher ceramic yield. For Co-PCS-O2 fibers derived from cured Co-PCS-O2, lower pyrolysis temperature was required to reach maximum mechanical properties. And higher SiCx Oy content, higher growing speed and final sizes of β-SiC and CoSi grains and lower electrical conductivity were observed. Co-PCS-O2 fibers have a electrical conductivity con- trollable between 1O^0～10^3Ω·cm and were magnetic to some degree, enabling this kind of fibers to have the po- tential to be used as wave-absorbing materials.