Structure and mechanical properties of high-porosity macroscopic agglomerates formed by random ballistic deposition -: art. no. 115503
Structure and mechanical properties of high-porosity macroscopic agglomerates formed by random ballistic deposition -: art. no. 115503
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DOI：
10.1103/physrevlett.93.115503
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发表时间：
2004-09-10
影响因子：
8.6
通讯作者：
Schräpler, R
中科院分区：
文献类型：
--
作者：
Blum, J;Schräpler, R
我们提出了由弹道击打沉积形成的宏观团聚体的机械性能的实验结果。采用新实验方法生产的团聚体由直径为 1.5 微米的单分散 SiO2 球体组成，体积填充系数为 phi=0.15，与随机弹道沉积的理论值非常接近。它们在高达 500 Pa 的单向压缩下具有机械稳定性。对于高于该值的压力，对于高于 10(5) Pa 的压力，体积填充系数会增加到最大值 phi=0.33。轻微压缩的样品 (phi=0.2) 的拉伸强度为 1000 Pa。
We present experimental results on the mechanical properties of macroscopic agglomerates formed by ballistic hit-and-stick deposition. The agglomerates, produced with a new experimental method, consist of monodisperse SiO2 spheres with 1.5 mum diameter and have a volume filling factor of phi=0.15, matching very closely the theoretical value for random ballistic deposition. They are mechanically stable against unidirectional compression of up to 500 Pa. For pressures above that value, the volume filling factor increases to a maximum of phi=0.33 for pressures above 10(5) Pa. The tensile strength of slightly compressed samples (phi=0.2) is 1000 Pa.