Superplasticity in Gold Nanowires through the Operation of Multiple Slip Systems,Advanced Functional Materials

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Superplasticity in Gold Nanowires through the Operation of Multiple Slip Systems
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-10-21 , DOI: 10.1002/adfm.201805258
Guang Cao ₁ , Jiangwei Wang ₁ , Kui Du ₂ , Xuelu Wang ₂ , Jixue Li ₁ , Ze Zhang ₁ , Scott X. Mao ₃

Affiliation

Dislocation activity in metallic nanowires often causes shear localization and premature necking, resulting in an early fracture. Here, in situ nanomechanical testing reveals a strong orientation‐dependent dislocation‐mediated superplastic deformation in gold (Au) nanowires, with more than 100% uniform elongation achieved before the fracture of [111]‐oriented nanowires. Such superplastic deformability of [111]‐oriented Au nanowires originates from the close coordination of homogeneously activated dislocation events on the three equivalent slip planes, which effectively eliminates the dislocation‐induced deformation localization in Au nanowires with other orientations. This work sheds new light on the dislocation plasticity in metallic nanostructures, and is of technological importance for designing metallic nanostructures and nanodevices with high reliability.

中文翻译：

通过多个滑移系统的操作，金纳米线中的超塑性

金属纳米线中的位错活动通常会导致剪切局部化和过早的颈缩，从而导致早期断裂。在这里，原位纳米力学测试揭示了金（Au）纳米线中强烈的与方向相关的位错介导的超塑性变形，在[111]取向的纳米线断裂之前，均获得了100％以上的均匀伸长率。[111]取向的Au纳米线的这种超塑性可变形性源自在三个等效滑动面上的均相活化的位错事件的紧密配合，这有效地消除了其他方向的Au纳米线中由位错引起的形变局部化。这项工作为金属纳米结构中的位错可塑性提供了新的思路，

更新日期：2018-10-21

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