Our manuscript on functionally graded metal syntactic foam has been published in Materials & Design as an open access article.
Abstract: In this research study a novel functionally graded metal syntactic foam (FG-MSF) was manufactured using ex- panded perlite and activated carbon particles. A tailored arrangement of these fillers was infiltrated with ZA27 alloy in a single-step process. The structure of the FG-MSF contained two individual layers: ZA27/expanded per- lite (EP-MSF) and ZA27/activated carbon (AC-MSF) syntactic foam. The density ofthese FG-MSFs varied between 2.11 and 2.15 g·cm−3. Microstructural studies confirmed that no relevant chemical reaction occurred within the foam, in particular in the vicinity ofthe particle-matrix interfaces. The mechanical properties ofthe produced FG- MSFwere evaluated using quasi-static compression testing. The results showed that the deformationmechanism of the FG-MSF is a mixed mode and varies between the two different filler layers. The energy absorption of the FG-MSF sample was increased compared to uniform syntactic foams containing only a single particle filler.