Solidification Behavior and Microstructure of Al-7Si Alloys with Individual and Combined Additions of Sr and Yb

Figure 6

SEM micrographs of the deep etched eutectic Si of the Al-7wt%Si alloys fully modified from the melt being held for (a) 5 min, (b) 15 min, (c) 60 min, and (d) 120 min after combined additions of 0.05 wt.% Sr and 0.7 wt.% Yb.