Formation of porous SiC ceramics by pyrolysis of wood impregnated with silica

International Journal of Applied Ceramic Technology, 3(6): pp. 485-490.Biomorphous β-SiC ceramics were produced at 1400°C from pine wood impregnated with silica. This one-step carbothermal reduction process decreases the cost of manufacturing of SiC ceramics compared to siliconization of carbonized wood in silicon vapor. The synthesized sample exhibits 14 m2/g surface area and has a hybrid pore structure with large 5- 20 μm tubular macropores and small (< 50 nm) slit shaped mesopores. SiC whiskers of 20- 400 nm in diameter and 5-20 μm in length formed within the tubular pores. These whiskers are expected to improve the filtration by removing dust particles that could otherwise penetrate through large pores. After ultrasonic milling, the powdered sample showed an average particle size of ~30 nm. The SiC nanopowder produced in this process may be used for manufacturing SiC ceramics for structural, tribological, and other applications

Trends in manufacturing of silicon carbide whiskerized fibres

Translated from Russian (Presented at Advanced Materials '99, Kiev)Available from British Library Document Supply Centre-DSC:9023.190(9972)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo