title: Three-dimensional coherent x-ray diffraction imaging of a ceramic nanofoam: determination of structural deformation mechanisms.
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.
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA.
authors.forename: A
authors.initials: A
authors.lastname: Barty
authors.forename: S
authors.initials: S
authors.lastname: Marchesini
authors.forename: H N
authors.initials: HN
authors.lastname: Chapman
authors.forename: C
authors.initials: C
authors.lastname: Cui
authors.forename: M R
authors.initials: MR
authors.lastname: Howells
authors.forename: D A
authors.initials: DA
authors.lastname: Shapiro
authors.forename: A M
authors.initials: AM
authors.lastname: Minor
authors.forename: J C H
authors.initials: JC
authors.lastname: Spence
authors.forename: U
authors.initials: U
authors.lastname: Weierstall
authors.forename: J
authors.initials: J
authors.lastname: Ilavsky
authors.forename: A
authors.initials: A
authors.lastname: Noy
authors.forename: S P
authors.initials: SP
authors.lastname: Hau-Riege
authors.forename: A B
authors.initials: AB
authors.lastname: Artyukhin
authors.forename: T
authors.initials: T
authors.lastname: Baumann
authors.forename: T
authors.initials: T
authors.lastname: Willey
authors.forename: J
authors.initials: J
authors.lastname: Stolken
authors.forename: T
authors.initials: T
authors.lastname: van Buuren
authors.forename: J H
authors.initials: JH
authors.lastname: Kinney