Three-dimensional coherent x-ray diffraction imaging of a ceramic nanofoam: determination of structural deformation mechanisms.
Phys Rev Lett
; 101(5): 055501, 2008 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-18764404
ABSTRACT
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Óxidos
/
Tantálio
/
Difração de Raios X
/
Cerâmica
/
Nanoestruturas
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Estados Unidos