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arXiv 0708.4035cond-mat.mtrl-sciphysics.optics
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纳米泡沫陶瓷的三维相干X射线衍射成像:结构变形机制的确定

Three-dimensional coherent X-ray diffraction imaging of a ceramic nanofoam: determination of structural deformation mechanisms

A. Barty, S. Marchesini, H. N. Chapman, C. Cui, M. R. Howells, D. A. Shapiro, A. M. Minor, J. C. H. Spence, U. Weierstall, J. Ilavsky, A. Noy, S. P. Hau-Riege, … 展开作者

A. Barty, S. Marchesini, H. N. Chapman, C. Cui, M. R. Howells, D. A. Shapiro, A. M. Minor, J. C. H. Spence, U. Weierstall, J. Ilavsky, A. Noy, S. P. Hau-Riege, A. B. Artyukhin, T. Baumann, T. Willey, J. Stolken, T. van Buuren, J. H. Kinney

摘要:

超低密度聚合物、金属和陶瓷纳米泡沫因其高强度重量比、高表面积和归因于其结构几何形状的绝缘性能而具有价值。我们利用X射线衍射成像技术获得了氧化钽纳米泡沫的内部结构。从结构的有限元分析揭示了与散装样品和扩散限制集群聚集模型一致的机械性能,而在节点上的多余的质量折扣的悬空碎片的渗滤理论的假设。

英文摘要:

Ultra-low density polymers, metals, and ceramic nanofoams are valued for their high strength-to-weight ratio, high surface area and insulating properties ascribed to their structural geometry. We obtain the labrynthine internal structure of a tantalum oxide nanofoam by X-ray diffractive imaging. Finite element analysis from the structure reveals mechanical properties consistent with bulk samples and with a diffusion limited cluster aggregation model, while excess mass on the nodes discounts the dangling fragments hypothesis of percolation theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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