Fractal geometry change induced by compression densification
Fractal geometry change induced by compression densification
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DOI：
10.1016/s0022-3093(98)00748-0
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发表时间：
1998-11-01
影响因子：
3.5
通讯作者：
Phalippou, J
中科院分区：
文献类型：
--
作者：
Beurroies, I;Duffours, L;Phalippou, J
研究了具有分形几何结构的低密度气凝胶经等静压压缩后的织构变化。从小角X射线散射实验中分析了分形特征。结果发现，在致密化的开始，在相关长度的减少发生，而分形维数增加了一点点。等静压压缩导致团簇相互渗透。这种激发的固臂纠缠改变了团簇的分形范围。对于较高的压力相关长度不改变表明集群大小是恒定的。进一步的致密化与位于簇之间的孔隙的塌陷有关。(C)1998 Elsevier Science B.V.保留所有权利。
Texture change induced by an isostatic compression of low density aerogels exhibiting fractal geometry has been investigated. Fractal features are analyzed from small angle X-ray scattering experiments. It was found that at the onset of densification a decrease in the correlation length occurs while the fractal dimension increases a little. Isostatic compression leads to cluster interpenetration. This provoked solid arm entanglement modifies the fractal range of cluster. For higher pressures correlation length does not change indicating that the cluster size is constant. Further densification has been related to the collapse of pores located between clusters. (C) 1998 Elsevier Science B.V. All rights reserved.