Journal of Porous Media

CAPACITY OF ENERGY ABSORPTION BY FLICK THROUGH SHOCK IN COOPER FOAMS

RESUMO

The aim of this work is to develop and characterize new materials with height properties, especially foams based on copper, obtained by powder metallurgy techniques using a NaCl space holder. The shock resistance (impact energy absorbed) and porosity measurements were carried out. The foams were investigated by optical microscope to show the pore dimensions and internal structure. Factors like sintering temperature, space holder size, and copper percentage are studied, too, and have an influence on the mechanical properties of open-cell foams. It was also determined that a higher sintering temperature increases the compactness of samples and the amount of impact energy absorbed. By increasing the dimensions of the space holders and the percentage of them in the mixture, a greater absorption of the impact energy results. A higher sintering temperature has a negative influence on the foam porosity - the porosity decreases when the temperature increases. Another factor that directly influenced the porosity is the copper content, namely, with increasing percentage in the mixture, walls become thicker and pores more closed. The impact energy absorption was investigated using a device designed and built specifically for this purpose.