Abstract
Beta-silicon carbide whiskers (β-SiCw) were synthesized by heating powdered “silica black” ore, which consisted mainly of SiO2, carbon, Al2O3, Fe2O3, in a closed graphite crucible in argon at 1673K for 3.6×104s. When the samples were dispersed in cotton fibers before heating, a large concentration of whiskers resulted, which formed agglomerates several hundred microns in size. The individual whiskers were on average 0.3μm in diameter and 30μm long with an aspect ratio of 100. A droplet of composition, Fe2.5Si, was formed on a tip of each whisker, suggesting the VLS growth mechanism.
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