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J. Korean Ceram. Soc. > Volume 52(4); 2015 > Article
Journal of the Korean Ceramic Society 2015;52(4): 248.
doi: https://doi.org/10.4191/kcers.2015.52.4.248
Asperities on the Surface of Plate-like Alumina and their Effect on Nacre-inspired Alumina-PMMA Composites
Bo-Yeon Kim, Yoonjoo Lee, Soo-Ryong Kim, Dong-Geun Shin, Woo-Teck Kwon, Duck-Kyun Choi1, Younghee Kim
Energy Efficient Material Team, Korea Institute of Ceramic Engineering and Technology
1Division of Materials Science and Engineering, Hanyang University
ABSTRACT
Natural materials often have unique mechanical properties, such as the hierarchical structure of nacre formed through mineral bridges or asperities created between an inorganic particle and a natural-layer surface. As these asperities produce an exceptional shear resistance, in this study, we aimed to emulate the natural structure of nacre by synthesizing inorganic asperities and mineral bridges with different temperatures in the range of $1100-1300^{circ}C$ and clay contents from 10 - 50 wt%. Following the infiltration of methyl methacrylate, we measured the mechanical properties to assess whether they were improved by the asperities. It was confirmed that the asperities improved the bending strength by 10%, and the anchoring effect was observed on the fracture surface.
Key words: PMMA, Composite, Asperity, Energy efficiency, Plate like Alumina
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