| Al(OH)3-SiO2-AlF3 조성으로 합성된 뮬라이트 휘스커의 특성평가 |
| 이홍림, 강종봉 |
| 경남대학교 신소재공학부 |
| Characterization of Mullite Whiskers Synthesized with Compostion of Al(OH)3-SiO2-AlF3 |
| Hong-Lim Lee, Jong-Bong Kang |
| Division of Advanced Materials Engineering, Kyungnam University |
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| ABSTRACT |
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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. |
| Key words:
Mullite whiskers, Vapor-solid reaction, Nano-indentation |
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