Plateau–Rayleigh instability with a grain boundary twist
Plateau–Rayleigh instability with a grain boundary twist
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DOI：
10.1063/5.0103658
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发表时间：
2022-10
影响因子：
4
通讯作者：
O. Hussein;D. Keith Coffman;K. Hattar;E. Lang;S. Dillon;F. Abdeljawad
中科院分区：
文献类型：
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作者：
O. Hussein;D. Keith Coffman;K. Hattar;E. Lang;S. Dillon;F. Abdeljawad
我们证明了使用理论，计算和实验研究的形态不稳定性，其中一个多晶纳米棒打破了在晶界（GB）成一个孤立的域阵列。我们的理论模型被用来建立一个中立的稳定性表面划分稳定和不稳定的扰动。结果表明，GB中起着不稳定的作用，其中的临界波长的不稳定性随着GB的能量的增加而减少。我们进行相场模拟，揭示了加速夹断动力学的GB能量的增加和预测的时间演变的界面配置文件与实验观察的定量协议。
We demonstrate using theoretical, computational, and experimental studies a morphological instability, in which a polycrystalline nanorod breaks up at grain boundaries (GBs) into an array of isolated domains. Our theoretical model is used to establish a neutral stability surface demarcating stable and unstable perturbations. It is shown that GBs play a destabilizing role in which the critical wavelength for the instability decreases with the increase in the GB energy. We carry out phase field simulations, which reveal accelerated pinch-off kinetics with the increase in the GB energy and predict temporal evolution of interfacial profiles in quantitative agreement with experimental observations.