(1. 東北大學(xué) 理學(xué)院，沈陽 110004；
2. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110004)
摘 要: 以ZrH2為發(fā)泡劑，采用熔體發(fā)泡法制備鋁基小孔徑泡沫鋁，分析其制備過程及影響孔結(jié)構(gòu)的因素；優(yōu)化實驗室制備泡沫鋁的工藝條件；借助圖形分析方法表征泡沫鋁的孔徑分布，并與TiH2制備的泡沫鋁進(jìn)行了對比；采用改進(jìn)座滴裝置研究鋁合金與氫化物的潤濕行為。結(jié)果表明：ZrH2較適合制備小孔徑泡沫鋁；優(yōu)化工藝條件為：Al 650 g，增粘劑Ca 的加入量2.5%，發(fā)泡劑ZrH2的加入量1.0%，發(fā)泡溫度680 ℃，攪拌時間1.5 min，保溫時間2.5 min；制備的泡沫鋁孔徑均勻，平均孔徑小于1.5 mm；ZrH2在鋁合金中的潤濕特點是導(dǎo)致泡沫鋁孔徑較小的主要原因。
關(guān)鍵字: 泡沫鋁；熔體發(fā)泡法；氫化鋯；潤濕性
melt-based route of ZrH2
（1. College of Sciences, Northeastern University, Shenyang 110004, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract:Foam aluminum with small pore diameters was prepared by the melt-based route using ZrH2 as foaming agent. The relationship between the foaming process parameters and the cell structures of foam aluminum was studied. The foaming process conditions were optimized. The pore diameter distribution of the foam aluminum was characterized by the graphical analysis method and the foaming agent TiH2 was commonly used for the comparison. The improved sessile drop device was used to research the wetting behaviors of Al alloy on the surface of hydride. The results indicate that the foaming agent ZrH2 is suitable for preparation of the small pore diameter foam aluminum and the optimized process conditions are obtained (650 g of Al; addition of Ca 2.5%; ZrH2 1.0%; temperature 680 ℃; stirring time 1.5 min; holding time 2.5 min). The average pore diameter is uniform and below 1.5 mm. The wetting behaviors are the main factor of influencing the pore diameter.
Key words: foam aluminum; melt-based route; zirconium hydride; wettability
