Bonding process for aluminum foams using foaming of aluminum precursor

提出了发泡粘接作为泡沫铝的一种粘接方法。泡沫铝可以在不破坏细胞壁和密度增加的情况下粘合。在本研究中，实验研究了发泡粘接的有效性。以钎焊铝合金为原料制备了钎焊前驱体。由于发泡剂颗粒分散在前驱体中，前驱体通过加热产生泡沫。将前驱体放入两个槽状的纯泡沫铝中，加热到前驱体的熔点以上。两个开槽的纯泡沫铝可以通过发泡粘接进行粘接。但发泡粘结的粘结强度低于胶粘剂的粘结强度。对钎焊铝与纯泡沫铝的粘结区进行了显微观察。键合边界清晰可见。为了使发泡粘接获得较高的粘接强度，应考虑表面处理。

The foaming bonding was proposed as a bonding method for aluminum foams. The aluminum foams can be bonded without collapse of the cell wall and density increase. In this study, the effectiveness of the foaming bonding was investigated experimentally. The brazing precursor was manufactured from brazing aluminum alloy. The precursor foams by heating because the foaming agent particles were dispersed in the precursor. The precursor was put into two grooved pure aluminum foams and heated over the melting point of the precursor. Two grooved pure aluminum foams can be bonded by foaming bonding. However, the bonding strength with foaming bonding was lower than that of the adhesive. Microscopy of the bonded area between brazing aluminum and pure aluminum foams was carried out. The bonding boundary was clearly observed. The surface treatment should be considered in order to obtain the high bonding strength with foaming bonding.