空心玻璃微珠/Al基泡沫材料的微观组织与性能研究

选用直径为40~80μm的空心玻璃微珠、铝粉为原料,制备含有不同体积分数的空心玻璃微珠Al基泡沫材料,并分析其显微组织与性能。研究结果表明,空心玻璃微珠Al基泡沫材料的密度范围在1.37~2.21 g/cm^3,孔隙率为18.23%~49.13%。当空心玻璃微珠的体积分数为30%、40%时,微珠分布比较均匀;体积分数达50%时,微珠出现团聚,团聚随着体积分数的增大而变得严重,团聚处微珠与基体的结合不好;在制备样品过程中,基体铝发生轻微氧化,微珠与基体也发生微量反应;微珠体积分数为40%的泡沫材料的吸能能力较好,达到62.88 MJ/m^3;材料的吸能能力随着微珠含量的增多而降低。

Study on microstructure and properties of hollow glass micro-beads/Al-based foam materials

In this paper,hollow glass microspheres with a diameter of 40~80μm and Al powder are used as raw materials.The hollow glass micro-beads/Al-based foam material with different volume fraction of microspheres are prepared,and the microstructures and properties of the samples are analyzed.The density of samples ranges from 1.37 g/cm^3 to 2.21 g/cm^3,and the porosity is 18.23%~49.13%according to the study result.When the volume fraction of the micro-bead is 30%and 40%,the microspheres distribute evenly.When the volume fraction reaches 50%,the micro-beads agglomerate,and the agglomeration becomes serious with the increase of the volume fraction,and the bonding between the micro-beads and the matrix is poor.The matrix aluminum of the composite material is slightly oxidized,and micro-beads react slightly with the matrix.The energy absorption capacity of foam material is better(62.88 MJ/m^3)when the volume fraction of micro-beads is 40%.The energy absorption capacity decreases with the increase of the content of micro-beads.