多孔Al-Si12合金的制备与性能研究  

Fabrication and properties of porous Al-Si12 alloy

作　　者：王俊[1] 左孝青[1] 杨牧南[1] 赵明伟[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《功能材料》2013年第5期709-712,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51164019);云南省应用基础研究重点资助项目(2010CC004)

摘　　要：采用真空—压力烧结—溶解工艺制备出了孔隙率44%～76%、平均孔径30～110μm的多孔Al-Si12合金,对多孔Al-Si12合金的制备、孔结构、抗弯强度及渗透性能进行了研究。结果表明,真空环境下的压力烧结可明显提高多孔Al-Si12合金的抗弯强度,最佳的制备工艺为压制压力500MPa、烧结温度565℃、烧结时间2h以及烧结压力150～200MPa;多孔Al-Si12合金的相对渗透系数随其孔隙率和平均孔径的提高而增大;多孔Al-Si12合金的抗弯强度高于相近孔结构的多孔铝,渗透性能优于相近孔结构的多孔不锈钢及多孔铝。Porous A1-Si12 alloys with porosity of 44%-76% and average cell diameter of 30-110μm were iabnca- ted by the vacuum - pressure sintering - dissolution processing. The preparation processing, pore structure, bending strength and filtration property of the fabricated porous A1-Si12 alloy were studied. The results showed that the bending strength of porous A1-Si12 alloy could be promoted evidently by applying a certain of vacuum sinter pressure, the optimal processing parameters were deduced experimentally at cold pressure of 500MPa, sinter temperature of 565℃, sinter time of 2h and sinter pressure of 150-200MPa. With the increasing of poros- ity and average cell diameter, the relative permeability coefficient of porous A1-Sil2 alloy increased. Porous A1- Sil2 alloy has a higher bending strength than the similar cell structure porous A1. Compared with the similar cell structure porous stainless steel and porous A1, the porous A1-Si12 alloy possesses a better filtration proper- ty.

关 键 词：多孔Al-Si12合金 制备 抗弯强度 渗透性能 

分 类 号：TF124[冶金工程—粉末冶金] TF125.6[冶金工程—冶金物理化学]