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Vol.52, No.10, 777 ~ 783, 2014
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| Title |
| Simultaneous Synthesis and Sintering of Nanostructured MgAl2O4-Mg3Al2Si3O12 Composite and its Mechanical Properties |
| 강현수 Hyun Su Kang , 도정만 Jung Mann Doh , 윤진국 Jin Kook Yoon , 손인진 In Jin Shon |
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| Abstract |
| Nanopowders of MgO, Al2O3 and SiO2 were made by high energy ball milling. The simultaneous synthesis and consolidation of nanostuctured MgAl2O4-Mg3Al2Si3O12 composites from milled 4MgO, 2Al2O3 and 3SiO2 powders was investigated by a high-frequency induction heating process. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition of grain growth. Highly dense nanostructured MgAl2O4-Mg3Al2Si3O12 composites were produced with a simultaneous application of 80 MPa pressure and an induced current within 1 min. The relative density and fracture toughness of the composite were 98% and 3.2 MPam1/2, respectively. The fracture toughness of the MgAl2O4-Mg3Al2Si3O12 composite was higher than that of monolithic MgAl2O4. |
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| Key Words |
| compounds, nanostructured materials, sintering, mechanical properties |
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