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首页> 外文期刊>Advanced Functional Materials >A General Strategy to Fabricate Flexible Oxide Ceramic Nanofibers with Gradient Bending-Resilience Properties
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A General Strategy to Fabricate Flexible Oxide Ceramic Nanofibers with Gradient Bending-Resilience Properties

机译：用梯度弯曲弹性性能制造柔性氧化物陶瓷纳米纤维的一般策略

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摘要

Inorganic materials assembled with rigid elements such as crystals or graphitized carbon generally show brittleness and hardness. However, it is found that both TiO2 ceramic crystal nanofibers (NFs) and carbon NFs show superior flexibility, in which the former are surprisingly knottable and the latter exhibit excellent bending-resilience property. The different flexure mechanisms are revealed by fabricating composite NFs of these two constituents and find that the carbon NFs can be recovered to the original states after releasing the external force, while the bending-resilience is weakened and the softness of the composite NFs is enhanced upon increasing the TiO2 content. The graphitized carbon can store mechanical deformation energy that enables the NFs with bending-resilience, while both the homogeneous interfaces between TiO2 crystals and the heterogeneous interfaces between TiO2 and carbon can alleviate stress concentration, which reduce the flexural modulus of the composite NFs. By filling different contents of elastic carbon into TiO2 NFs, a series of flexible NFs that exhibit gradient bending-resilience properties are fabricated. This study provides a deeper understanding of the mechanical properties of inorganic materials.
机译：与晶体或石墨化碳等刚性元件组装的无机材料通常显示出脆性和硬度。然而，发现TiO2陶瓷晶体纳米纤维（NFS）和碳NFS均显示出优异的柔韧性，其中前者令人惊讶的刺痛，后者表现出优异的弯曲弹性性能。通过制造这两个成分的复合NFS来揭示不同的挠曲机制，并发现碳NFS可以在释放外力后回收到原始状态，而弯曲抵抗力被削弱并且复合NFS的柔软度提高增加TiO2内容。石墨化的碳可以存储机械变形能量，使得NFS能够具有弯曲弹性，而TiO 2晶体之间的均匀界面和TiO 2和碳之间的非均相接口可以减轻应力浓度，这减少了复合NFS的弯曲模量。通过将不同含量的弹性碳含量填充到TiO 2 NFS中，制造了一系列表现出梯度弯曲弹性性能的柔性NF。本研究提供了对无机材料的力学性能的更深入了解。

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