包套轧制粉末冶金法制备泡沫铝三明治板

Preparation of Aluminum Foam Sandwich Panels by Powder-Filled Tube Rolling

以空气雾化的AlSi12合金粉、镁粉和氢化钛粉末为原料,采用包套轧制法成功制备出了泡沫铝三明治板材.利用300 dpi扫描仪、扫描电镜(SEM)和显微硬度仪等检测方法系统比较了复合轧制和包套轧制方法对制备前驱体的宏观形貌和界面结合及其泡孔结构的影响,结果表明:包套轧制可以有效阻止面板材料裂纹的扩展,获得完整的和致密度均匀的预制坯,并能实现面板芯材的有效结合,最终获得泡孔结构完整和均匀的泡沫铝三明治板.

Aluminum foam sandwich（AFS） panels were successfully prepared by the powder-filled tube rolling process we developed with the commercial AlSi12 alloy,Mg and TiH2 powder used as raw materials,and the precursors prepared by such a process were systematically compared with that by the composite rolling process in macro-morphology,interfacial bonding and foam structure via a scanner with a resolution 300A4!dpi,SEM and micro-hardometer.The results showed that the aluminum foam panels prepared in this way can prevented them from crack propagation effectively and keep their complete shape with uniform compactness,thus providing the effective bonding between panels and core material.In the finished aluminum foam sandwich panels the foaming structures are complete and uniformly distributed.