|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XVII
||Structural Stability and Chemical Reactivity of Nanoscale Twinning Structure in Copper Nanowires
||Wei-Lun Weng, Jheng-Syun Lee, Chien-Neng Liao
|On-Site Speaker (Planned)
Copper nanowires (CuNWs) with high-density nanotwinning structure have attracted wide research attention due to their spectacular physical and chemical properties, such as high mechanical strength, good ductility, low electrical resistivity, high corrosion resistance and enhanced electromigration (EM) resistance. These material properties, in general, can be tailored by controlling the twinning structure including the spacing and orientation of coherent twin boundaries (CTBs) in CuNWs. In this study, the electromigraion behavior of nanotwinned CuNWs were in-situ monitored by transmission electron microscopy. The Cu EM was found to depend on crystal-orientation and was delayed substantially at the surface/CTB triple junctions in the CuNWs. The CuNWs with dense perpendicular CTBs evolved eventually into a zig-zag surface structure under electrical stressing. Moreover, the CTB-spacing dependent surface structure and its influence on chemaical reactivity of nanotwinned CuNWs is also reported.
||Planned: Supplemental Proceedings volume