Al-Sahlani Kadhim, Taherishargh Mehdi, Kisi Erich, Fiedler Thomas
School of Engineering, the University of Newcastle, Callaghan 2308, Australia.
Materials (Basel). 2017 Sep 13;10(9):1073. doi: 10.3390/ma10091073.
Metal matrix syntactic foams have been fabricated via counter-gravity infiltration of a packed bed of recycled expanded glass particles (EG) with A356 aluminum alloy. Particle shrinkage was studied and has been utilized to increase the particles' strength and tailor the mechanical properties of the expanded glass/metal syntactic foam (EG-MSF). The crushing strength of particles could be doubled by shrinking them for 20 min at 700 °C. Owing to the low density of EG (0.20-0.26 g/cm³), the resulting foam exhibits a low density (1.03-1.19 g/cm³) that increases slightly due to particle shrinkage. Chemical and physical analyses of EG particles and the resulting foams were conducted. Furthermore, metal syntactic foam samples were tested in uni-axial compression tests. The stress-strain curves obtained exhibit three distinct regions: elastic deformation followed by a stress plateau and densification commencing at 70-80% macroscopic strain. Particle shrinkage increased the mechanical strength of the foam samples and their average plateau stress increased from 15.5 MPa to 26.7 MPa.
通过用A356铝合金对回收的膨胀玻璃颗粒（EG）填充床进行反重力渗透，制备了金属基复合泡沫材料。对颗粒收缩进行了研究，并利用其提高颗粒强度，进而调整膨胀玻璃/金属复合泡沫材料（EG-MSF）的力学性能。在700℃下将颗粒收缩20分钟，其抗压强度可提高一倍。由于EG的低密度（0.20-0.26克/立方厘米），所得泡沫的密度较低（1.03-1.19克/立方厘米），且由于颗粒收缩而略有增加。对EG颗粒和所得泡沫进行了化学和物理分析。此外，对金属复合泡沫样品进行了单轴压缩试验。得到的应力-应变曲线呈现三个不同区域：弹性变形，随后是应力平台，以及在宏观应变达到70-80%时开始的致密化。颗粒收缩提高了泡沫样品的机械强度，其平均平台应力从15.5兆帕增加到26.7兆帕。
