Effect of cenosphere particle size and relative density on the compressive deformation behavior of aluminum-cenosphere hybrid foam

Cenospheres (spherical microballoons) of different size ranges are used to make aluminum alloy - cenospheres hybrid foam with varying relative densities. The cells are quite uniform in size and the cenospheres are uniformly distributed in cell walls. The relative density varied by varying foaming temperature and it varies between 0.11 and 0.32. The plateau stress, energy absorption increases with increase in relative density and decrease in cenosphere size. The densification strain is almost invariant to the cenosphere size.165