(1. 昆明理工大學(xué) 材料科學(xué)與工程學(xué)院，昆明 650093；
2. 中國重汽濟(jì)南卡車股份有限公司，濟(jì)南 250116)
摘 要: 為獲得高強(qiáng)度的微米孔徑多孔鋁，通過真空−壓力燒結(jié)−溶解工藝制備微米孔徑多孔鋁，對制備過程、微米孔徑多孔鋁的強(qiáng)度及滲透性能進(jìn)行研究。結(jié)果表明：真空環(huán)境下的壓力燒結(jié)可明顯促進(jìn)鋁粉燒結(jié)，提高微米孔徑多孔鋁的抗彎強(qiáng)度；在壓制壓力500 MPa、燒結(jié)溫度650 ℃、燒結(jié)時間2 h以及燒結(jié)壓力150~200 MPa條件下可獲得孔隙率44%~61%、平均孔徑55~230 μm的多孔鋁；隨著孔隙率和平均孔徑的提高，微米孔徑多孔鋁的相對滲透系數(shù)增大；與尺寸相同、孔結(jié)構(gòu)相似的多孔不銹鋼相比，微米孔徑多孔鋁具有較好的滲透性能和較高的耐壓破壞比強(qiáng)度。
關(guān)鍵字: 多孔鋁；微米孔徑；強(qiáng)度；滲透性
（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
