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Al 2 O 3 / ZrO 2 composites have been investigated as the bio-inert material. In the present work Al 2 O 3 / ZrO 2 Micro/Nano composites were prepared by colloidal method. The effects of the concentration of zirconium propoxide and the sintering temperature were studied on the distribution of ZrO 2 nano-grains in Al 2 O 3 matrix and mechanical properties of composites. XRD patterns for all compositions showed a single phase of a-Al 2 O 3 , and the tetragonal and monoclinic ZrO 2 phases. Samples sintered at 1650°C demonstrated the high bulk density with value of 86-92% of theoretical density. ZrO 2 nano-grains were dispersed within Al 2 O 3 grain and the grain boundary. The sample of the highest flexural strength of 710 MPa was synthesized using 100% Zr propoxide solution and sintered at 1650 o C. The flexural strength was found to increase with increasing the concentration of Zr propoxide and sintering temperature.
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Boonsorn et al. (2014) studied this question.
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