粉煤灰增黏制备泡沫铝材料的研究

以粉煤灰为增黏剂,TiH2为发泡剂,将它们先后加入到铝熔体之中并搅拌均匀,进而获得闭孔型泡沫铝材料·结果表明:粉煤灰的加入量在3%～5%范围内可以获得密度较小、孔隙率较高的泡沫铝材料;当粉煤灰颗粒尺寸在61～147μm时,泡沫铝的密度、孔隙率 粉煤灰粒度关系曲线较为平缓,制得的泡沫铝材料胞孔结构较好;在泡沫铝制造过程中用粉煤灰代替金属Ca进行增黏可降低生产成本;在铝熔体中添加粉煤灰,有利于制备强度较高的泡沫铝材料·

Fabrication Aluminum Foam with Fly Ash as Viscosifier

Closed-pore aluminum foam was fabricated by way of adding fly ash first as viscosifier and TiH2 powder as foamer into molten aluminum then stirring it. The results showed that low density and high porosity feature the aluminum foam when the amount of added fly ash is ranging from 3% to 5%, and the aluminum foam will have a good cell structure, i.e., a relatively plain relationship curve among the density and porosity of aluminum foam and particle size of fly ash, if the fly ash particle size is ranging from 61 μm to 147 μm. Using fly ash as viscosifier instead of Ca to increase the viscosity of aluminum melt will not only reduce the cost but also provide high strength for aluminum foam.