Abstract
Abstract Unidirectionally solidified porous Cu-24 wt.% Mn alloy is prepared by the Gasar process, using mold casting equipment under various conditions. The experimental process demonstrates the feasibility of fabricating a Gasar structure for alloys with a wide solidification temperature range, as well as a columnar dendritic structure. The effects of melt temperature, initial mold temperature, and partial gas pressures on the pore structure and microstructure of an alloy matrix were investigated. The growth and interruption of directional pores were analyzed based on the solidification mode to determine whether the fine-grained region atop directional pores stunted the growth of Gasar pores.
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