607429.fig.003a
(a)
607429.fig.003b
(b)
Figure 3: SEM images of the cell wall material for (a) hydride and (b) carbonate kinds of Al foams (F12, F13) based on Al-Zn-Mg alloy and performed (b) with (F13) and (a) without (F12) Ca additive: (a) cracks within partly converted TiH2, (b) crack lengthways the domain of redundant phase.