Fig. 9

SEM photograph of grains after processing and addition of Si3N4 powders for: (a-d) for 1050 AA, (e-h) for 2011 AA, and (i-l) for 6063 AA.

SEM photograph of grains after processing and addition of Si3N4 powders for: (a-d) for 1050 AA, (e-h) for 2011 AA, and (i-l) for 6063 AA.