Advances in experimental mechanics at atomic scale
Advances in experimental mechanics at atomic scale
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DOI：
10.1016/j.eml.2021.101284
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发表时间：
2021-03-24
影响因子：
4.7
通讯作者：
Mao, Scott X.
中科院分区：
文献类型：
--
作者：
Zheng, Sixue;Mao, Scott X.
随着电子设备的不断发展，这些设备中使用的金属材料的尺寸从亚微米连续减小到几纳米。小尺寸材料通常表现出上级的机械性能，并且与它们的大块对应物具有显著不同的机械行为。深入了解小尺度金属的原子力学行为对于设计新的纳米结构材料以保证未来纳米器件的可靠性和稳定性至关重要。本文首先介绍了小尺寸金属原子尺度原位变形动力学的实验技术和样品制备方法。然后，综述了原子尺度实验力学的最新进展，包括尺寸相关的缺陷成核、孪生相关机制、相变、扩散变形和伪弹性。最后，讨论了原子实验力学研究的局限性和未来的发展方向。爱思唯尔有限公司出版
With the ongoing trend of miniaturizing electronic devices, the dimensions of metallic materials used in these devices decrease continuously from sub-microns to a few nanometers. Small-sized materials usually exhibit superior mechanical properties and dramatically different mechanical behaviors from their bulk counterparts. Deep insights into the atomistic mechanical behaviors in small-scale metals are of vital importance for designing new nanostructured materials to guarantee the reliability and stability of future nanodevices. This review firstly presents state-of-the-art experimental techniques and sample preparation methods for atomic-scale in situ deformation dynamics on small-sized metals. Then, recent advances in atomic-scale experimental mechanics are summarized, including size-dependent defect nucleation, twinning-related mechanism, phase transformation, diffusional deformation and pseudoelasticity. Finally, current limitations and future directions for research in the field of atomistic experimental mechanics are discussed. Published by Elsevier Ltd.