Journal ArticleDOI
Fabrication and deformation of three-dimensional hollow ceramic nanostructures
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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
Bone-inspired healing of 3D-printed porous ceramics
An Xin,Kunhao Yu,Runrun Zhang,Bingyuan Ruan,Allyson L. McGaughey,Zhangzhengrong Feng,Kyung Hoon Lee,Yong Chen,Amy E. Childress,Qiming Wang +9 more
TL;DR: Wang et al. as discussed by the authors employed bacteria as artificial osteoblasts to enable healing of 3D-printed porous ceramics at room temperature, and demonstrated on-demand healing of ceramic dental crowns, ceramic water membranes, and ceramic lattices.
DissertationDOI
Magnetically Driven Multifunctional Nanorobots for Biomedical Applications
TL;DR: In this article, the authors present a survey of the state-of-the-art in medical nanorobots, including the following: 1.1.1 History of Nanorobotics 2 1.3 Current State of the Art 3 1.2.
Journal ArticleDOI
Hybrid hierarchical nanolattices with porous platinum coating
TL;DR: In this article , a core-shell polymer-platinum nanolattice was fabricated by combining several fabrication techniques, including two-photon lithography and atomic layer deposition (ALD).
Dissertation
Liquid crystals in woodpile photonic crystals : fabrication, numerical calculation and measurement
TL;DR: In this paper, experimental and numerical studies on liquid crystal (LC) infiltrated woodpile Photonic Crystal (PhC) are implemented in both the linear and nonlinear regime, where dye-doped LC is used to create graded indices inside LC medium corresponding to intensity.
Journal ArticleDOI
Compositional optimization of high-solid-loading ceramic cores via 3D printing
TL;DR: In this article , the effects of ZrO 2 mineralizer on the curing behavior of a silica-based core slurry and the microstructure and properties of the core were analyzed to optimize the properties.
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.