195654.fig.004a
(a)
195654.fig.004b
(b)
195654.fig.004c
(c)
195654.fig.004d
(d)
Figure 4: Typical SEM microstructure of Al-Fe composite shows (a) distribution of Fe particles over Al matrix sintered at 550°C, residual and grain boundary porosities (b) sintered at 510°C, (c) sintered at 550°C, and (d) 590°C.