Abstract 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.

中文翻译：

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具有耐高温和机械强度的超低密度三维纳米碳化硅架构

摘要 碳化硅纳米管/纳米线 (SiCNT/NWs) 在极端热和氧化环境中表现出优异的机械性能。在这里，我们展示了一种易于扩展的过程，可以使用 SiCNT/NW 构建块合成毫米尺寸的三维架构，以创建具有出色机械强度、刚度和弹性的超低密度材料。这些宏观材料的结构最初是使用碳纳米管合成的，然后利用形状记忆合成 (SMS) 方法转化为纳米碳化硅。建议使用这种技术，最初可以使用纳米碳构建块创建任何微结构，并针对特定应用的必要形态特征进行优化。这里，