发泡工艺参数对闭孔泡沫铝胞结构的影响  

Effect of foaming parameters on cell structure of a closed cell aluminum foam

作　　者：孟祥鋆 王德庆[1] 郭昭君[1] 薛微微[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《材料热处理学报》2006年第6期5-9,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50371013);辽宁省教育厅(202033221)

摘　　要：采用压缩空气法制备闭孔泡沫铝,研究空气流量、搅拌速度和发泡温度对胞结构的影响。结果表明泡沫铝的胞直径为4-11mm,密度为0.10-0.22g/cm3,孔隙率最高达96.3%;泡沫铝的胞直径随着空气流量和发泡温度的增大而增大,随搅拌速度的增大而减小,其中空气流量对胞直径的影响最显著;壁厚和结点尺寸随空气流量和搅拌速度的变化规律与胞直径相反;在相同的搅拌速度下,泡沫铝的密度随着胞直径的增大而减小且与胞直径存在对应关系,搅拌速度为600r/min时,关系式为ρ=0.0278+0.3602.e-0.132d。A closed cell aluminum foam with the same composition but different cell sizes and structures was prepared by changing air injection rate,foaming temperature and impeller speed during foaming process.The influence of the processing parameters on cell structure was studied.The results show that the foam is characterized as closed-cells with density range of 0.10-0.22 g/cm3 and cell diameter of 4-11mm.The cell size of aluminum foam increases as the air volume increases,reduces as the impeller speed increases,and higher impeller speed results in a much smaller cell size at given air injection rate.Moreover,the higher impeller speed produces smaller size of the foam cells with thicker cell wall and plateau border size,which results in higher density foam in contrast to the foam with the same cell size prepared at lower impeller speed.

关 键 词：闭孔泡沫铝 工艺参数 壁厚 胞直径 

分 类 号：TB34[一般工业技术—材料科学与工程]