Abstract
In this paper, the characterization of aluminum foam produced from aluminum scrap by using CaCO3 as foaming agent was investigated. The results showed that the density of aluminum foam lies in the range of 0.40 to 0.60 g/cm3 and relative density ranged from 0.14 to 0.25 with high porosity between 78% and 85%. The microstructure examination of aluminum foam was done using XRD, SEM, and EDX. The obtained results indicate that, the aluminum holes were distributed uniformly in the matrix. The electrical resistance of aluminum foam was determined and compared with electrical resistance of dense aluminum. The results showed that the electrical resistance of aluminum foam is greater than the electrical resistance of dense aluminum. But, the thermal conductivity of aluminum foam is lower than thermal conductivity of dense aluminum. Energy absorption of aluminum foam was obtained by both impact and compression tests and it was observed that the energy absorption obtained from impact test is close to the energy absorption obtained from compression test. The produced aluminum foams can be used for high impact energy absorption applications.
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