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利用聚合物泡沫采用压力浸渗铸造工艺制备开孔泡沫铝。所制备的泡沫铝能够很好地复制聚合物泡沫的几何尺寸。开孔泡沫铝的强度比闭孔泡沫铝的低很多,从而得到更多的应用。添加陶瓷颗粒可以改善泡沫铝的力学性能。本研究中,向 AC3A 铝合金中添加 SiC 颗粒得到复合材料泡沫。在复合材料泡沫中,SiC 颗粒嵌入在合金基体中及孔筋表面。高体积分数的陶瓷颗粒使合金泡沫铝的压缩强度、能量吸收、显微硬度增大。这些性能的改善归结为于泡沫铝的结构改变以及 SiC 颗粒存在于结点和孔筋处而引起的强度增加。
The use of polymer foam pressure impregnation casting process to prepare open-cell aluminum foam. The prepared aluminum foam can well reproduce the polymer foam geometry. The strength of open-cell aluminum foam is much lower than closed-cell aluminum foam, resulting in more applications. Adding ceramic particles can improve the mechanical properties of aluminum foam. In this study, SiC particles were added to AC3A aluminum alloy to obtain composite foam. In composite foam, SiC particles are embedded in the alloy matrix and on the surface of the rebar. High volume fraction of ceramic particles make the alloy foam aluminum compressive strength, energy absorption, increased microhardness. The improvement of these properties is attributed to the structural change of the aluminum foam and the increase of the strength caused by the presence of SiC particles at the nodes and the bores.