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Anomalous detwinning in constrained Cu nanoparticles.
Nanoscale ( IF 5.8 ) Pub Date : 2020-06-10 , DOI: 10.1039/d0nr01407a Mengke Ge 1 , Wenjuan Yuan , Kai Wang , Jia He , Wei Xi , Jun Luo
Nanoscale ( IF 5.8 ) Pub Date : 2020-06-10 , DOI: 10.1039/d0nr01407a Mengke Ge 1 , Wenjuan Yuan , Kai Wang , Jia He , Wei Xi , Jun Luo
Affiliation
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In this work, the detwinning process in a 9 nm graphene-constrained Cu nanoparticle was investigated at 1009 °C via in situ high-resolution transmission electron microscopy. Instead of the expected reverse glide of the twinning dislocations, two new twins were formed; the four twin zones rotated synergistically before vanishing. Furthermore, the twin boundary migration energy and the system energy were increased continuously with detwinning. The increased resistance to twin boundary migration in constrained nanoparticles enriches our understanding of the twinning mechanism and may facilitate the design of high-strength and high-ductility nanomaterials.
中文翻译：
约束铜纳米粒子中的异常缠绕。
在这项工作中，通过原位高分辨率透射电子显微镜在1009°C下研究了在9 nm石墨烯约束的Cu纳米粒子中的解缠过程。没有形成孪生位错的预期的反向滑行，而是形成了两个新的孪生。四个孪生区域在消失之前协同旋转。此外，孪晶边界迁移能和系统能随着解缠而不断增加。约束纳米颗粒中对双晶边界迁移的增加抵抗力丰富了我们对双晶机理的理解，并可能有助于设计高强度和高延展性的纳米材料。
更新日期：2020-07-16
中文翻译：
约束铜纳米粒子中的异常缠绕。
在这项工作中，通过原位高分辨率透射电子显微镜在1009°C下研究了在9 nm石墨烯约束的Cu纳米粒子中的解缠过程。没有形成孪生位错的预期的反向滑行，而是形成了两个新的孪生。四个孪生区域在消失之前协同旋转。此外，孪晶边界迁移能和系统能随着解缠而不断增加。约束纳米颗粒中对双晶边界迁移的增加抵抗力丰富了我们对双晶机理的理解，并可能有助于设计高强度和高延展性的纳米材料。
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