采用粉末包套轧制法成功制备出泡沫铝夹层板,通过对粉末包套轧制工艺的研究,结合SAYN—CG90数码相机和扫描电镜(SEM)等检测方法系统研究了初始密度和压下率对制备可发泡预制体的影响,以及泡沫铝夹层板的泡孔结构的影响,结果表明:当初始密度大于2.40g/cm^2,压下率为65%~75%的时候,可以获得面板表面良好,粉体均匀、致密的预制坯,并且实现面板与芯层的有效结合,最终获得泡孔结构完整和均匀的泡沫铝夹芯板。
Aluminum foam sandwiches were successfully prepared by the powder pack - rolling method. Effects of initial density and reduction rate on macro - morphology of the foamable sandwich, interfaeial bonding and the foam structure were systematically investigated by the theoretical analysis of powder pack -rolling using a SAYN -CG90 digital camera and scanning electronic microscopy (SEM). The results show that when the initial density is more than 2.40g/cm3 and the reduction rate ranges from 65% to 75% , the panel is temper rolling, the foarnable sandwich can be completed and uniform dense foamable can be obtained. Macro -flaw can't be observed on the panel. Finally the effective bonding between the panel and core is realized; ultimately completed and uniform pore structure of aluminum foam sandwich panels can be achieved.