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J. Korean Ceram. Soc. > Volume 39(2); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(2): 153.
doi: https://doi.org/10.4191/kcers.2002.39.2.153
습식법에 의한 Al2O3-TiO2 복합체의 합성 및 특성연구 I. Al2O3-TiO2 복합체의 기계적 특성(2)
밀양대학교 재료공학과
Study on Properties of Al2O3-TiO2 Composites by Wet Method I. Mechanical Properties of Al2O3-TiO2 Composites(2)
Su-Chak Ryu
Department of Materials Engineering, Miryang National University
$Al_2O_3$ composites powders with 1∼11 wt% $TiO_2$ were prepared by wet method and sintered at 1350$^{circ}C$, 1450$^{circ}C$ for 2h. Mechanical properties and microstructural evolution were investigated in this study. $Al_2O_3$-3 wt% $TiO_2$ composite were high bulk density of 2.37 g/$cm^3$ and low apparent porosity of 6.3%. The composites containing of 3 wt% $TiO_2$ showed moderately high bending strength of 68.9 MPa and the young's modulus of 35.5 MPa. The composites with increasing $TiO_2$ contents exhibit reduced thermal expansion coefficient due to the formation of $Al_2TiO_5$ phase.ᜎࠀࠀ㘲㌮㠵㘻Ԁ䭃䑎䷕᜕ఽ0〳⸵㬅K䍄乍븗ጊ缀Ѐ㘰〻Ԁ䭃䑎䶩᜖ഏ3㠴⸰㠻Ԁ䭃䑎䴀
Key words: $Al_2O_3-TiO_2$ composite, Mechanical property, Microstructure, Thermal expansion coefficient
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