Biomimetic Synthesys of Silicon Carbide from Mamboo

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BIOMIMETIC SYNTHESYS OF SILICON CARBIDE FROM MAMBOO By Kazunori KIJIMA Kyoto Institute of Technology, Matsugasaki Sakyo-ku, Kyoto, 606-8585,( [e-mail] )The present study is to prepare SiC with similar microstructure to bamboo structure using bamboo as starting materials. SiC could be obtained by reacting carbonized/graphitized bamboo with silicon at high temperature.Bamboo was heated below than 300^oC for charcoal , above 1450^oC for siliconization, and below than 2100^oC for graphitization. The reaction product was fabricated by infiltrating a silicon melt into the porous bamboo charcoal or graphite.Reaction products were identified with β-SiC and Si by powder XRD and Raman spectroscopy. SEM observation showed that the reaction process transformed the bamboo charcoal to the dense Si/SiC material with a composite structure. By comparison the microstructure of bamboo with that of SiC, the structure was not changed.