3.2. Structure of the produced copper foam
Typical macroscopic morphology and microscopic structure of the
studied Cu-foams are shown in Fig. 2. The weight ratio of the copper
powder to the amount of space holder in this case was calculated to
obtain a porosity of 65% in the final foam. A network of well-bonded
Cu particles is clear, since the original shape of the copper powder
boundaries obtained by the compaction is not discernible. Instead,
recrystallized copper grains are visible in both cases, while a number
of micropores exist in the Cu matrix