| Title |
Simultaneous Synthesis and Sintering of Nanostructured MgAl2O4-Mg3Al2Si3O12 Composite and its Mechanical Properties |
| Authors |
강현수(Hyun Su Kang); 도정만(Jung Mann Doh); 윤진국(Jin Kook Yoon); 손인진(In Jin Shon) |
| DOI |
https://doi.org/10.3365/KJMM.2014.52.10.777 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
compounds; nanostructured materials; sintering; mechanical properties |
| 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. |