Abstract
To stabilize graded foaming of aluminum alloy precursors, the adjustment of the amounts of TiH_2 foaming agent and SiC stabilizing agent may be important. On the other hand, the usage of prealloyed powder and the granulation of ceramic particle additives were found be effective to the stabilization of foaming, in the previous study. In the present study, the effects of the combination adjustment of SiC / TiH_2 on the foaming behavior of the prealloyed powder precursor with SiC granules were examined. Consequently, both large expansion and high height-to-width ratio of the foam specimens were attained to some extent with an appropriate combination of SiC and TiH_2 contents.
