Role of Oxide Particles in Aluminum Melt towardAluminum Foam Fabrication by the Melt Route

摘要

The aim of this work is to elucidate the role and contribution of oxide particles to aluminum foam fabrication. The melts were internally oxidized by a thickening process in which pure alumi-num melt was stirred with or without the addition of 1.5 wt. % calcium for maximum 25 min. After this, each thickened samples were melted again and mixed for 100 s by introducing 1.5 wt. % TiH_2 as a blowing agent. In order to investigate the foam evolution, the foam samples were hold in the furnace for 50 to 500 s.