Microstructure evolution and mechanical properties of Mg matrix composites reinforced with Al and nano SiC particles using spark plasma sintering followed by hot extrusion

In this study, Mg powders, Al and nano SiC particles were uniformly mixed by mechanical stirring assisted with ultrasonic vibration method. Then reinforced Mg-1Al-xSiC (x = 0.3, 0.6, 1.2, 2.4 wt %) composites were successfully fabricated by spark plasma sintering (SPS) followed by hot extrusion. Experimental results revealed that there was a nearly uniform distribution and good dispersion of nano SiC particles within the Mg matrix, although some...