Abstract
Since the spontaneous infiltration of molten AZ91 Mg alloy into the powder bed containing SiC particles occurred at 700°C for 1 h under a nitrogen atmosphere, it was possible to fabricate Mg alloy composites reinforced with SiC particles. Since the fabrication conditions (e.g. temperature, time and atmosphere) of the composite are different from those of the other fabrication route, reaction products formed during the composite fabrication were investigated in detail using field emission scanning electron microscopy and high resolution transmission electron microscopy. From the analysis of reaction products, the authors can identify the formation of MgO, MgAl2O4, Al12Mg17 and an AlN phase containing magnesium.
This work was supported by Priority Research Centers Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (grant no. 20090093814) and University of Incheon Research Grant in 2010.