碳纤维表面原位SiC纳米纤维的合成与生长  

In situ Growth of SiC Nanofibers on Carbon Fibers

作　　者：代吉祥[1] 张兆甫 王永昌[1] 王首豪 沙建军[1] 

机构地区：[1]大连理工大学,工业装备结构分析国家重点实验室,大连116024

出　　处：《无机化学学报》2015年第12期2379-2384,共6页Chinese Journal of Inorganic Chemistry

基　　金：教育部新世纪人才计划(No.NCET-11-0052);高等学校博士学科点专项科研基金博导类(No.2013004110013)资助项目

摘　　要：基于化学气相反应法,以高纯Si和SiO_2为反应源材料,在碳纤维表面原位生长β-SiC纳米纤维。采用XRD、SEM和TEM等分析测试手段对SiC纳米纤维进行了表征分析,研究了不同反应温度和时间对生成β-SiC纳米纤维微观形貌和结构的影响,并探讨了β-SiC纳米纤维的生长机制。研究结果表明：采取化学气相反应法能够制备高质量、高纯度的β-SiC纳米纤维,纳米纤维的直径约为100~300 nm。随着反应温度的提高和时间的延长,纳米纤维的产额增加,且微观组织形貌发生了变化。结合制备过程和纳米纤维微观结构的观察分析,表明气-固（VS）机制是SiC纳米纤维生长的主要机理。SiC nanofibers were synthesized on the carbon fiber fabrics by chemical vapor reactions. The morphology, microstructure and crystallinity of SiC nanofibers were characterized by X-ray diffractometer（XRD）,field emission scanning electron microscopy（FE-SEM） with energy dispersive spectrometer（EDS） and transmission electron microscopy（TEM）, respectively. Results indicated that the large quantity of SiC nanofibers can be sythesized on the carbon fibers. The different morphologis were observed for the SiC nanofibers synthesized at different temperatures, but the diameters was almost same, which is about 100~300 nm. Based on the synthesis process and the characterization results, the vapor-solid（VS） reaction process are dominant mechanism for the growth of SiC nanofibers.

关 键 词：SiC纳米纤维 碳纤维 化学气相反应法 气固机制 

分 类 号：O613.72[理学—无机化学]