Powder size effect on cell morphology of combustion synthesized porous Al3Ti/Al composite

Porous Al3Ti/Al composites were fabricated by the combustion foaming process and the effect of elemental powder size on porosity and cell morphology was investigated. High porosity was obtained by using the small titanium powders. Pores also became larger and more spherical by using the small titanium powders. Pore size became smaller and porosity became higher by decreasing the aluminum powder size. This tendency was remarkably observed on the specimens with high Al/Ti ratio (7.0).