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http://dx.doi.org/10.4191/KCERS.2002.39.2.153

Study on Properties of Al2O3-TiO2 Composites by Wet Method I. Mechanical Properties of Al2O3-TiO2 Composites(2)  

Ryu, Su-Chak (Department of Materials Engineering, Miryang National University)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.2, 2002 , pp. 153-158 More about this Journal
Abstract
$Al_2O_3$ 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.
Keywords
$Al_2O_3-TiO_2$ composite; Mechanical property; Microstructure; Thermal expansion coefficient;
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