: Combined metal foams have been considered in recent years due to their composite nature and higher mechanical properties than conventional metal foams. The properties of this foam group depend on a number of factors, such as the alloy of the field and the properties of the spatial material. In the meantime, the use of mineral porous particles as a spatial agent is due to the decrease in the cost of foam production. In this research, the design and characterization of aluminum composite foam using Al-4.5wt% Cu alloy as a metal background and expanded perlite particles with a mean particle size of 2 mm and a density of 0.33 g / cm3 As a spatial agent, we investigated the gas infiltration method using gaseous gas. For this purpose, the effect of melt and gas pressure factors on the molten ingosity process was first investigated and, after various experiments, the temperature of 750 ° C and atmospheric pressure were selected as the optimum foam formation conditions. The foam was made with a density of 1.55 ± 0.3 g / cm3, the diameter of the perlite particles expanded 50.3 ± 0.8 and the total porosity was about 45%. Microstructural investigations showed that, despite the directional cooling of the mold after the intrusion process, except for limited areas in the mold which were grown as directed dendrites in the opposite direction for heat transfer, the microstructure of the field It was mainly co-axial dendritic structure. The effect of this was the low thermal conductivity of expanded perlite particles relative to aluminum melt, the creation of thermal concentration points in the structure and interference with the thermal slip caused by external cooling. The average distance between the dendritic cells was 41.2 ?m for the lower part in the areas near the mold floor and 64.3 ± 1.4 mm for the upper areas of foam near the remaining aluminum part. The results of XRD and EDS tests indicated a chemical reaction and reduction of oxide compounds of perlite particles by aluminum molten to a small extent in the molten and particulate phase. In order to improve the mechanical properties of the foams made, the thermal treatment of T6 is performed on the foam samples in two atmospheres of ordinary and protected air (inside quartz-free air pipes) and the effect of thermal atmosphere on the mechanical properties of the final Also reviewed. Based on the results obtained, the thermal treatment in the ordinary atmosphere did not lead to the massive oxidation of aluminum foams, but the process carried out in the protective atmosphere in the method used in this study, due to the reduced cooling rate of the samples, caused a slight loss in properties The mechanical foam has become more common to atmospheric air. The results of thermal treatment T6 showed an increase of about 44 MPa in compressive strength, 90 MPa in constant region stress and 28 MJ / m in the absorption capacity of foams compared to casting mode. The same compression strain for all foams (averaging 39 to 40%) and the uniform strain of the samples during the pressure test showed a nearly uniform distribution of EP particles in the aluminum field and process repeatability. Keywords: syntactic foam, Al-4.5wt%Cu alloy, expanded perlite, interface, microstructure, mechanical properties, heat treatment.