Ultra-low density three-dimensional nano-silicon carbide architecture with high temperature resistance and mechanical strength

Silicon carbide nanotube/nanowires (SiCNT/NWs) exhibit excellent mechanical properties in extreme thermal and oxidative environments. Here, we demonstrate an easily scalable process to synthesize millimeter-sized three-dimensional architectures using SiCNT/NW building blocks to create materials with...

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Bibliographic Details
Published in:	Carbon (New York) Vol. 164; pp. 143 - 149
Main Authors:	Hart, Amelia H.C., Owuor, Peter Samora, Hamel, John, Bhowmik, Sanjit, Asif, S.A. Syed, Gentles, Anieph X., Ozden, Sehmus, Tsafack, Thierry, Keyshar, Kunttal, Mital, Rahul, Hurst, Janet, Vajtai, Robert, Tiwary, Chandra Sekhar, Ajayan, Pulickel M.
Format:	Journal Article
Language:	English
Published:	New York Elsevier Ltd 30-08-2020 Elsevier BV
Subjects:	3D architectures Carbon nanotubes Chemical synthesis Construction materials Conversion Density Extreme environments Graphene High temperature In-situ mechanical testing Mechanical properties Nanotubes Nanowires Shape memory Silicon carbide Silicon carbide nanowires Stiffness Thermal stability 3D architectures Carbon nanotubes Silicon carbide nanowires In-situ mechanical testing Thermal stability
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Summary:	Silicon carbide nanotube/nanowires (SiCNT/NWs) exhibit excellent mechanical properties in extreme thermal and oxidative environments. Here, we demonstrate an easily scalable process to synthesize millimeter-sized three-dimensional architectures using SiCNT/NW building blocks to create materials with excellent mechanical strength, stiffness, and resiliency with ultra-low density. The structure of these macro-materials is initially synthesized using carbon nanotubes, then utilizing the shape memory synthesis (SMS) method are converted to nano-silicon carbide. It is proposed that using this technique, any micro-structure can initially be created with nano-carbon building blocks, optimized for the necessary morphological features of a specific application. Here, the synthesis and subsequent SiCNT/NW conversion of carbon nanotube spheres and graphene foam, demonstrates the ability to use a simple, cost-effective conversion method to create a material that can mechanically perform in extreme environments. [Display omitted]
ISSN:	0008-6223 1873-3891
DOI:	10.1016/j.carbon.2020.03.045