Journal ArticleDOI
Fabrication and deformation of three-dimensional hollow ceramic nanostructures
TLDR
The fabrication of hollow ceramic scaffolds that mimic the length scales and hierarchy of biological materials are reported, suggesting that the hierarchical design principles offered by hard biological organisms can be applied to create damage-tolerant lightweight engineering materials.Abstract:
Creating lightweight, mechanically robust materials has long
been an engineering pursuit. Many siliceous skeleton species—
such as diatoms, sea sponges and radiolarians—have remarkably
high strengths when compared with man-made materials
of the same composition, yet are able to remain lightweight
and porous1–7. It has been suggested that these properties
arise from the hierarchical arrangement of different structural
elements at their relevant length scales8,9. Here, we report the
fabrication of hollow ceramic scaffolds that mimic the length
scales and hierarchy of biological materials. The constituent
solids attain tensile strengths of 1.75 GPa without failure
even after multiple deformation cycles, as revealed by in situ
nanomechanical experiments and finite-element analysis. We
discuss the high strength and lack of failure in terms of stress
concentrators at surface imperfections and of local stresses
within the microstructural landscape. Our findings suggest that
the hierarchical design principles offered by hard biological organisms
can be applied to create damage-tolerant lightweight
engineering materials.read more
Citations
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Journal ArticleDOI
Microlattice Metamaterials for Tailoring Ultrasonic Transmission with Elastoacoustic Hybridization
Sebastian Krödel,Chiara Daraio +1 more
TL;DR: In this article, the authors report that microlattices constitute a class of acoustic metamaterials that exploit elastoacoustic hybridization to tailor ultrasonic wave propagation.
Journal ArticleDOI
Damage-tolerant 3D-printed ceramics via conformal coating.
Seyed Mohammad Sajadi,Lívia Vásárhelyi,Reza Mousavi,Amir Hossein Rahmati,Zoltán Kónya,Ákos Kukovecz,Taib Arif,Tobin Filleter,Robert Vajtai,Robert Vajtai,Peter J. Boul,Zhenqian Pang,Teng Li,Chandra Sekhar Tiwary,Muhammad M. Rahman,Pulickel M. Ajayan +15 more
TL;DR: In this paper, a conformal polymer coating is applied to the soft phase of preceramic structures to improve their compressive strength and resilience to damage propagation, leading to more damage tolerance.
Journal ArticleDOI
In-situ mechanics of 3D graphene foam based ultra-stiff and flexible metallic metamaterial
TL;DR: A 3D macroporous graphene foam based ultra-lightweight, stiff and fatigue-resistant mechanical metamaterial is developed in this article, which has an extraordinary spring constant of ∼15'N/m and an upward of 70% recoverable deformation.
Journal ArticleDOI
Sub-10-nm suspended nano-web formation by direct laser writing
Sihao Wang,Ye Yu,Hailong Liu,Kevin T. P. Lim,Bharathi Madurai Srinivasan,Yong-Wei Zhang,Joel K. W. Yang,Joel K. W. Yang +7 more
TL;DR: In this article, the authors introduced a scheme to produce suspended nano-webs with feature sizes below 10 nm in IP-Dip resist using sub-threshold exposure conditions in a commercial DLW system.
Journal ArticleDOI
Growth and nanomechanical characterization of nanoscale 3D architectures grown via focused electron beam induced deposition.
Brett B. Lewis,Brittnee A. Mound,Bernadeta R. Srijanto,Jason D. Fowlkes,Jason D. Fowlkes,George M. Pharr,George M. Pharr,George M. Pharr,Philip D. Rack,Philip D. Rack +9 more
TL;DR: Load-displacement tests of a variety of 3-dimensional nanoarchitectures with and without Al2O3 coatings were measured, demonstrating a viscoelastic response in the FEBID material.
References
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Book
Cellular Solids: Structure and Properties
Lorna J. Gibson,Michael F. Ashby +1 more
TL;DR: The linear elasticity of anisotropic cellular solids is studied in this article. But the authors focus on the design of sandwich panels with foam cores and do not consider the properties of the materials.
Book
Introduction to Ceramics
TL;DR: In this paper, the authors present a model for the development of the MICROSTRUCTURE in CERAMICS based on phase transformation, glass formation and glass-Ceramics.
MonographDOI
Mechanical Behavior of Materials
TL;DR: A balanced mechanics-materials approach and coverage of the latest developments in biomaterials and electronic materials, the new edition of this popular text is the most thorough and modern book available for upper-level undergraduate courses on the mechanical behavior of materials as discussed by the authors.
Journal ArticleDOI
THE MATERIAL BONE: Structure-Mechanical Function Relations
S. Weiner,Hanoch Daniel Wagner +1 more
TL;DR: The structure-mechanical relations at each of the hierarchical levels of organization are reviewed, highlighting wherever possible both underlying strategies and gaps in the authors' knowledge.