Synthesis and characteristics of SiC whiskers with "rosary bead" morphology

Xian Jia and Xiaomei Ling1) Department of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China2) Department of Analytical Chemistry, School of Pharmaceutical Science, Peking University, Beijing 100083, China

摘 要：<正> SiC whiskers with "rosary bead" morphology were synthesized using suitable silicon source and carbon source through solid reaction at the temperature above 1537 K. The diameter and length of the SiC whiskers were about 0.1-1.0 μm and 20-100 μm, respectively. The largest diameter of their enlarged ends of the whiskers was about 0.2-1.0 μm, and it gradually and smoothly decreased to the size of the plain part of the whiskers. The results of X-ray diffraction analysis show that the crystalline structure of the obtained SiC whiskers is p-SiC. It is considered that the SiC whiskers grow via a vapor-solid mechanism.

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