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http://dx.doi.org/10.4191/KCERS.2006.43.5.320

Characterization of Mullite Whiskers Synthesized with Compostion of Al(OH)3-SiO2-AlF3  

Lee, Hong-Lim (Division of Advanced Materials Engineering, Kyungnam University)
Kang, Jong-Bong (Division of Advanced Materials Engineering, Kyungnam University)
Publication Information
Journal of the Korean Ceramic Society / v.43, no.5, 2006 , pp. 320-326 More about this Journal
Abstract
Mullite whiskers were synthesized by a vapor-solid reaction with $Al(OH)_3-SiO_2-AlF_3$. The heat treatment temperature did not affect the shape of mullite whisker but the composition change resulted in different sizes. The first one was $30-50{\mu}m$ in size with the aspect ratio of 60 and above, and the second one was $600{\mu}m$ and below in size with the aspect ratio of 15 and below. The $Al_2O_3$ content in formed mullite whisker was 73.57-80.29 wt%, which is high $Al_2O_3$ content composition. The Young's modulus and the hardness measured by nano-indentation method were 136.7 GPa and 19.81 GPa, respectively.
Keywords
Mullite whiskers; Vapor-solid reaction; Nano-indentation;
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