Effects of porosity and pore size on the compressive properties of closed-cell Mg alloy foam

On the particle size effect in expanded perlite aluminium syntactic foam

“…There has been good agreement on the effect of density and cell shape on the mechanical properties. It is now well accepted that the plateau stress and energy absorption of the metallic foams depends on density [1,[8][9][10][11][12] and cells geometry [3]. In the case of metallic syntactic foams, the density and cell shape cannot always be varied freely since they depend on the filler particles' morphology and density [13].…”

“…However, there are some contradictions on the effect of cell size on the mechanical properties of foams containing no filler materials. Some researchers reported that the mechanical properties of the foams improve as the cell size decreases [11,12,19], while others have shown that there is an optimum cell size at which the foam has superior mechanical properties [9,20,21]. Interestingly, some reports have shown that decreasing the cell size reduces the plateau stress and the energy absorption of the foams [1,22,23].…”

New Approaches to Aluminum Integral Foam Production with Casting Methods

“…Drainage is affected by the viscosity and the surface tension of liquid metal and causes cells to collapse, shape defects, and non-uniform distribution of solid metal. Melt viscosity is enhanced by adding second phase ceramic particles such as SiC, Al2O3, or MgO [9,[38][39][40][41][42][43][44].…”

A Study of Manufacturing and Mechanical Properties of Mg-foam Using Dolomite as the Blowing Agent: A Review

“… CaCO 3 coating was prepared by ion exchange method  Coating of CaCO 3 decreases contact angle(~15°) in comparison with uncoated carbonate  Coated carbonate for 40min had optimum impact on reducing foam density [10] 11.  With increase in mean pore size, mean plateau strength increases first and then decreases  Specimen with mean pore size of 1.5 mm possesses good combination of properties  Increase in porosity decreases the energy absorption capacities [11] 12.  Porosity increases with increase in hold temperature (580 to 600°C)  Pore number increases with hold temperature.…”

“…However most of scholars have worked on Al foam [5][6][7][8], because Al is cheaper, light weight and easily available. They have found out the different processes [9,10] and mechanical properties for instance porosity %, yield strength, energy absorption capacity [11] by varying the different parameters such as the effect of working temperature [12], addition of ceramic microspheres [8], without foaming agent [13], other foaming agent instead of TiH2 [5], effect of blowing agent composition [14] and so on.…”