Three-dimensional coherent x-ray diffraction imaging of a ceramic nanofoam: Determination of structural deformation mechanisms

被引：79

作者：

Barty, A. ^{[1
]}

Marchesini, S. ^{[1
,2
,3
]}

Chapman, H. N. ^{[1
,3
]}

Cui, C. ^{[2
]}

Howells, M. R. ^{[2
]}

Shapiro, D. A. ^{[2
]}

Minor, A. M. ^{[2
]}

Spence, J. C. H. ^{[4
]}

Weierstall, U. ^{[4
]}

Ilavsky, J. ^{[5
]}

Noy, A. ^{[1
]}

Hau-Riege, S. P. ^{[1
]}

Artyukhin, A. B. ^{[1
]}

Baumann, T. ^{[1
]}

Willey, T. ^{[1
]}

Stolken, J. ^{[1
]}

van Buuren, T. ^{[1
]}

Kinney, J. H. ^{[6
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[3] Univ Calif Davis, Ctr Biophoton Sci & Technol, Sacramento, CA 95817 USA

[4] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA

[5] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[6] Univ Calif San Francisco, Dept Prevent & Restorat Dent Sci, San Francisco, CA 94143 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.101.055501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultralow 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.

引用

页数：4

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