Anelasticity of twinned CuO nanowires

Anelasticity of twinned CuO nanowires
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孪晶 CuO 纳米线的滞弹性

DOI:
10.1007/s12274-015-0868-x
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发表时间:
2015-09
期刊:
影响因子:
9.9
通讯作者:
Wang, Jianbo
Wang, Jianbo
中科院分区:
材料科学1区
文献类型:
--
作者:
Li, Lei;Liu, Chun;Zhao, Dongshan;Wang, Jianbo

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采用原位透射电镜研究了氧化铜纳米线的力学行为。在压缩过程中,NWs表现出与高机械应力相关的高弯曲能力。有趣的是,在压力释放后一直观察到非弹性。进一步的研究表明,非弹性是CuO NWs固有的,尽管电子束辐照被证明能够加速形状恢复。提出了一种基于双相关原子协同运动的机制来解释这一现象。该研究结果为CuO NWs的力学性能提供了新的见解,它是纳米级阻尼系统的有前途的材料。
The mechanical behavior of CuO nanowires (NWs) was investigated byin situtransmission electron microscopy. During compression, the NWs exhibited high bending capabilities associated with high mechanical stress. Interestingly, anelasticity was consistently observed after stress release. Further investigations indicate that the anelasticity is intrinsic to the CuO NWs, although electronbeam irradiation was proved capable of accelerating the shape recovery. A mechanism based on the cooperative motion of twin-associated atoms is proposed to account for this phenomenon. The results provide insight into the mechanical properties of CuO NWs, which are promising materials for nanoscale damping systems.
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