Rapid synthesis and consolidation of nanostructured MgAl2O4 compound by pulsed current activated sintering and its mechanical properties

Abstract

Nanopowders of Al2O3 and MgO were fabricated by high energy ball milling. The rapid synthesis and sintering of nanostuctured MgAl2O4 compound were investigated by the pulsed current activated sintering process. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition of grain growth. A highly dense nanostructured MgAl2O4 compound was produced with the simultaneous application of 80 MPa pressure and a pulsed current of 2800A within two minutes. The grain sizes and mechanical properties of MgAl2O4 sintered at 1320 degrees C were investigated.