Infiltration Process of Molten Aluminum into Porous Medium
Infiltration of molten metal into porous media under pressure is an important process for the fabrication of porous metal or sponge metal. The reasonable infiltration way is crucial for preparing perfect porous metal, especially for that with superfine structure (pore diameter of 0.05-0.1mm). In this paper, infiltration process of molten aluminum into salt precursor is presented to prepare foamed aluminum. Experiments show the defects are prone to occuring in the middle of lower part of precursor, then, after the salt is removed by dissolving in water water, the foamed aluminum with defect is obtained. The results show that the infiltration process of molten aluminum into porous medium proceeds in three steps: 1.infiltration of the space between the die and medium; 2.infiltration of external portion; 3.infiltration of central portion, which leading to the incomplete infiltration of liquid aluminum into the middle of down-part of medium because of the increasing resistance and the decreasing temperature along the infiltrating. Best samples are obtained by adjusting the parameter values of pressure, preheating temperature of medium and overheat temperature of liquid aluminum.
Aluminum foam infiltration behavior defect superfine pore
Wang Fang Li Bao-cheng Wang Lu-cai
Department of Material Science and Technology, North University of China,, Taiyuan Shanxi 030002;Col College of Material Science and Technology, Taiyuan University of Science and Technology, Taiyuan Sh
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）