泡沫铝夹芯板制备及其冲击性能研究

Preparation and Impact Properties of Aluminum Foam Sandwich Panels

采用复合轧制的方法,即将带有发泡剂的混合粉末置于两铝面板之间进行复合轧制使之成为预制发泡体,然后再在炉中发泡的方法,制备界面为冶金结合的泡沫铝夹芯板,通过摆锤冲击实验,研究界面为冶金结合的泡沫铝夹芯板与胶接夹芯板的冲击性能的区别。结果表明,胶接界面冲击后发生开裂,冶金结合的界面冲击后并没有发生开裂现象,界面为冶金结合的泡沫铝夹芯板的抗冲击性要比胶接的好。冶金结合界面夹芯板,孔隙率较大的抗冲击性比孔隙率较小的好。

The foam aluminum sandwich panels with metallurgy bonding interface are prepared by the sandwich rolling method, the two Al face-sheets are stacked and mixed powders with foam agent are put between them, which are sandwich rolled and a foaming precursor is obtained, then it is foamed in heating furnace. The difference of the impact property between the sandwich structure with metallurgy bonding interface and gluebonding interface is investigated by the pendulum impact tests. By comparison, it is concluded that the resistance to impact of the panels with metallurgy bonding is better than that with glue bonding because after impact test, the glue-bonding interface is laminated, but metallurgy bonding interface is not laminated. And for the panels with metallurgy bonding, resistance to impact of the panel with large porosity is better than that with small porosity.