Formation of SiC Rods in Composites of SiC/SiO2/C from Carbonized Wood Infiltrated with Ethylsilicate-40

Joko Sulistyo (Department of Forest Products Technology, Faculty of Forestry, Universitas Gadjah Mada, Yogyakarta)
Toshimitsu Hata (Research Institute for Sustainable Humanosphere, Uji Campus - Kyoto University, Gokasho, Uji, Kyoto 611-0011)
Sri Nugroho Marsoem (Department of Forest Products Technology, Faculty of Forestry, Universitas Gadjah Mada, Yogyakarta)

Wood Research Journal : Journal of Indonesian Wood Research Society
Vol 2, No 1 (2011): Wood Research Journal

Silicon carbide rods were formed in composites of silicon carbide/silicon dioxide/carbon (SiC/SiO2/C) from carbonized wood impregnated with ethyl silicate-40 after heat treatments using a pulse current apparatus. The effect of reaction temperatures, heating rates and pressures on the SiC rods formation was investigated. Raman spectroscopy indicated that the SiC rods possessed well crystalline. The SiC rods in the composites prepared at 1200 and 1400°C exhibited straight structure with smooth surfaces. The increase of reaction temperature up to 1600°C increased the length and diameter of SiC rods which exhibited a camelback-type structure. Different heating rate only determined the length of SiC rods grown; meanwhile the increase of pressure from 0 to 15 MPa increased the length and diameter of SiC rods grown.