Dispersion of SiC Whiskers in mixtures of ethanol and ethanediol

Shis, Kun-Chin; Chou, Shyan-Liang; Huang, Jow Lay

doi:10.1016/0272-8842(93)90051-r

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2018

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“…Whiskers are filament single crystals and have attracted much attention because of their near theoretical strength value, unique physical and chemical performance [1,2]. By adding whiskers into the ceramic tool composites, the strength and toughness can be significantly improved [3][4][5]. However, there are very few types of whiskers commercially available on a large scale [6,7].…”

Section: Introductionmentioning

confidence: 99%

Preliminary study on the growth mechanism of zircon whiskers prepared via non-hydrolytic sol-gel method combined with carbon black as reducing agent

Feng

Jiang

et al. 2018

PAC

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Zircon whiskers were prepared at 700°C via non-hydrolytic sol-gel method combined with carbon black as reducing agent, Si(OC 2 H 5) 4 (TEOS) and ZrCl 4 as precursors and LiF as mineralizer. The whiskers were characterized and their growth mechanism was discussed. The results show that the introduction of carbon black is beneficial for the preferential axial growth of zircon crystals into whiskers. The diameter and aspect ratio of zircon whiskers are 30-40 nm and 6-15, respectively. The zircon whiskers grow along the [001] direction, which is c-axis oriented. The growth mechanism is revealed to be the screw dislocation mechanism with the mass transport mainly from the zircon crystal particle matrix.

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