Room-temperature oxygen vacancy migration induced reversible phase transformation during the anelastic deformation in CuO.
Room-temperature oxygen vacancy migration induced reversible phase transformation during the anelastic deformation in CuO.
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CuO 迟弹性变形过程中室温氧空位迁移诱导可逆相变
DOI：
10.1038/s41467-021-24155-z
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发表时间：
2021-06-23
影响因子：
16.6
通讯作者：
Wang J
中科院分区：
文献类型：
--
作者：
Li L;Chen G;Zheng H;Meng W;Jia S;Zhao L;Zhao P;Zhang Y;Huang S;Huang T;Wang J
从力学角度看，一般考虑高温下点缺陷的影响，尤其是蠕变为主的情况下。在这里，我们展示了室温下CuO纳米线中应力诱导的可逆氧空位迁移，导致了意想不到的非弹性变形。非弹性应变与缺乏氧的CuOxphase成核有关，该CuOxphase在应力释放后逐渐转变回CuO，导致纳米线形状逐渐恢复。详细的分析揭示了一个在文献中被忽视的缺氧亚稳CuOxphase。理论和实验研究都准确地预测了氧空位在CuO中的扩散途径。我们的发现有助于更好地理解材料中复杂的机械行为，这也可能涉及多个科学学科，如高温超导和Cu-O化合物的固态化学等。
From the mechanical perspectives, the influence of point defects is generally considered at high temperature, especially when the creep deformation dominates. Here, we show the stress-induced reversible oxygen vacancy migration in CuO nanowires at room temperature, causing the unanticipated anelastic deformation. The anelastic strain is associated with the nucleation of oxygen-deficient CuOxphase, which gradually transforms back to CuO after stress releasing, leading to the gradual recovery of the nanowire shape. Detailed analysis reveals an oxygen deficient metastable CuOxphase that has been overlooked in the literatures. Both theoretical and experimental investigations faithfully predict the oxygen vacancy diffusion pathways in CuO. Our finding facilitates a better understanding of the complicated mechanical behaviors in materials, which could also be relevant across multiple scientific disciplines, such as high-temperature superconductivity and solid-state chemistry in Cu-O compounds, etc.
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影响因子：
41.2
作者：
Li, Fei;Lin, Dabin;Zhang, Shujun
通讯作者：
Zhang, Shujun
影响因子：
56.9
作者：
Lai, Alan;Du, Zehui;Schuh, Christopher A.
通讯作者：
Schuh, Christopher A.
影响因子：
56.9
作者：
Jia, CL;Lentzen, M;Urban, K
通讯作者：
Urban, K
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2.1
作者：
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通讯作者：
STIZZA, S
影响因子：
10.8
作者：
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通讯作者：
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