空心球/铝基复合泡沫材料制备及性能研究

采用粉末冶金技术制备了不同孔隙率的空心球/铝基复合泡沫材料,对其进行T7热处理,并开展了不同孔隙率材料压缩性能及隔声性能的测试。结果表明,制备的泡沫材料中空心球均匀分布于基体内,且空心球与基体之间形成明显的过渡层;空心球/铝合金基复合泡沫材料的压缩应力-应变曲线呈现线弹性、应力平台、致密化3个阶段。随着孔隙率的增加,空心球/铝合金基复合泡沫材料的压缩峰值应力、平台应力及能量吸收能力均呈先上升后下降的变化趋势;随着孔隙率的增加,复合泡沫材料隔声性能逐渐下降。

Investigation on Fabrication and Properties of Hollow Spheres/Aluminum Matrix Composite Foams

Hollow spheres/aluminum matrix composite foams with different porosity were prepared by powder metallurgy technology and T7 heat treatment,and the compressive properties and sound insulation properties of different porosity materials were tested.The results show that hollow spheres in matrix are distributed evenly,and transition layer between hollow spheres and matrix could be observed obviously.The compressive stress-stain curves of composite foams are mainly divided into three stages:linear elastic stage,stress plateau stage and densification stage.With the increasing of porosity,the compressive peak strength,platform stress and energy absorption capacity of the hollow spheres/aluminum alloy composite foams increase first and then decrease.And with the increasing of porosity,the sound insulation property of the materials decreases gradually.