MXenes公司
材料科学
消散
复合材料
断裂(地质)
纳米材料
氮化物
断裂力学
分子动力学
纳米技术
图层(电子)
化学
物理
计算化学
热力学
作者
Linlin Miao,Chao Sui,Weizhe Hao,Yushun Zhao,Guoxin Zhao,Jiaxuan Li,Junjiao Li,Cheng Gong,Yuna Sang,Chenxi Zhao,Zhonghai Xu,Xiaodong He,Chao Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-09-29
卷期号:23 (19): 9065-9072
标识
DOI:10.1021/acs.nanolett.3c02842
摘要
Two-dimensional (2D) transition metal carbides/nitrides (MXenes) are promising nanomaterials due to their remarkable mechanical and electrical properties. However, the out-of-plane mechanical properties of MXene under impact loading remain unclear. Here, particular impact-resistant fracture behaviors and energy dissipation mechanisms of MXene were systemically investigated via molecular dynamics (MD) simulation. Specifically, it was found that the specific penetration energy of MXene exceeds most conventional impact-resistant materials, such as aluminum and polycarbonate. Two kinds of novel energy dissipation mechanisms, including radial fracture and crushed fracture under different impact velocities, are revealed. In addition, the sandwiched atomic-layer structure of MXene can deflect cracks and restrain their propagation to some extent, enabling the cracked MXene to retain remarkable resistance. This work provides in-depth insights into the impact-resistance of MXene, laying a foundation for its future applications.
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