(1. 昆明理工大学 材料科学与工程学院，昆明 650093；
2. 中国重汽济南卡车股份有限公司，济南 250116)
摘 要: 为获得高强度的微米孔径多孔铝，通过真空−压力烧结−溶解工艺制备微米孔径多孔铝，对制备过程、微米孔径多孔铝的强度及渗透性能进行研究。结果表明：真空环境下的压力烧结可明显促进铝粉烧结，提高微米孔径多孔铝的抗弯强度；在压制压力500 MPa、烧结温度650 ℃、烧结时间2 h以及烧结压力150~200 MPa条件下可获得孔隙率44%~61%、平均孔径55~230 μm的多孔铝；随着孔隙率和平均孔径的提高，微米孔径多孔铝的相对渗透系数增大；与尺寸相同、孔结构相似的多孔不锈钢相比，微米孔径多孔铝具有较好的渗透性能和较高的耐压破坏比强度。
关键字: 多孔铝；微米孔径；强度；渗透性
（1. School of Materials Science and Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
2. CNHTC Jinan Truck Company, SINOTRUCK, Ji’nan 250116, China）
Abstract:Micron cell porous Al with high strength was fabricated by the vacuum-pressure sintering-dissolution processing. The preparation processing, strength and filtration property of the fabricated porous Al were studied. The results show that the sintering processing of Al powder under vacuum condition can be promoted evidently by applying a certain pressure to the sintered sample and result in a micron cell porous Al with high bending strength. Taking bending strength as the goal, the optimal processing parameters for fabricating micron cell porous Al with porosity 44%−61% and average cell diameter 55−230 μm were deduced experimentally as cold pressure 500 MPa, sintering temperature 650 ℃, sintering time 2 h and sintering pressure 150−200 MPa. With the increase of the porosity and average cell diameter, the relative permeability coefficient of porous Al increases. Compared with the porous stainless steel that has the same size and similar cell structure, the micron cell porous Al possesses a good filtration property and a higher specific compression collapsing strength.
Key words: porous Al; micron cell; strength; filtration property
