发泡剂粒度和发泡温度对泡沫镁合金结构的影响  

Effects of Particle Size of Foaming Agent and Foaming Temperature on Microstructure of Foamed Mg Alloy

作　　者：周全[1] 陈乐平[1] 尹健[1] 

机构地区：[1]南昌航空大学航空制造工程学院江西省材料科学与工程研究中心,江西南昌330063

出　　处：《热加工工艺》2012年第7期8-10,14,共4页Hot Working Technology

基　　金：航空科学基金资助项目(2009ZF56016);江西省科技支撑计划项目(2010EHB01800);江西省教育厅科技项目(GJJ11521);江西省材料科学与工程研究中心企业预研项目(ZX201001005)

摘　　要：采用熔体发泡法,对不同发泡剂粒度和发泡温度下泡沫镁合金的结构进行研究。结果表明:通过控制发泡剂的粒度和发泡温度,可制备出密度、孔隙率及气孔大小可调的泡沫镁合金;随着发泡剂粒度的增加,泡沫镁合金的密度先减小后增大,当发泡剂粒度为0.25mm时,泡沫镁合金的密度最小;随着发泡温度的提高,泡沫镁合金的密度逐渐减小;泡沫镁合金孔隙率的变化规律与密度的变化规律相反;随着发泡剂粒度的增加或发泡温度的升高,泡沫镁合金的气孔尺寸逐渐增大。The effects of particle size of foaming agent and foaming temperature on structure of foamed magnesium alloy prepared by direct foaming process were studied. Experimental results show that foamed magnesium alloy with different pore size, density and porosity can be obtained by controlling particle size of foaming agent and foaming temperature. As particle size of foaming agent increases, the density of foamed magnesium decreases at first and then increases. When the particle size of foaming agent is 0.25 mm,the density of foamed magnesium alloy is minimum. With the increase of foaming temperature, the density of foamed magnesium alloy decreases. Variation law of porosity of foamed magnesium is reverse to density. As particle size of foaming agent or foaming temperature increasing, the pore size of foamed magnesium alloy increases.

关 键 词：泡沫镁合金 发泡温度 发泡剂粒度 

分 类 号：TG146[一般工业技术—材料科学与工程]