The pores were distributed fairly uniformly in the copper matrix,
while the pore size was closely controlled by choosing raw cane sugar
particles of an appropriate size. In the examined cases, the pore size distribution
was relatively narrow as a result of the strict size-selection of raw
cane particles. More specifically, two different particle size ranges were
selected for the sugar: 0.5–1 mm and 0.125–0.5 mm. These lead to foam