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Nano Research 2015, 8(7): 2143-2151 https://doi.org/10.1007/s12274-014-0685-7
Research Article | Issue | Published: 17 July 2015

Ultrafast shape change and joining of small-volume materials using nanoscale electrical discharge

Show Author's Information Cheng-Cai Wang1,5,  Qing-Jie Li1,4,  Liang Chen1,2,  Yong-Hong Cheng2,  Jun Sun1,  Zhi-Wei Shan1( ),  Ju Li1,3( ),  Evan Ma1,4( )
Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC)State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an710049China
State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an710049China
Department of Nuclear Science and Engineering and Department of Materials Science and EngineeringMassachusetts Institute of Technology77 Massachusetts AvenueCambridgeMassachusetts02139USA
Department of Materials Science and EngineeringJohns Hopkins UniversityBaltimoreMaryland21218USA
SJS Limited101 Xihuan RoadJingzhouHubei434024China
Keywords:
nanoscale, metal, electrical discharge, welding, metallic glass
Cite this article:
Wang C-C, Li Q-J, Chen L, et al. Ultrafast shape change and joining of small-volume materials using nanoscale electrical discharge. Nano Research, 2015, 8(7): 2143-2151. https://doi.org/10.1007/s12274-014-0685-7
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Abstract Full text Electronic supplementary material About this article

Using nanoscale electrical-discharge-induced rapid Joule heating, we developed a method for ultrafast shape change and joining of small-volume materials. Shape change is dominated by surface-tension-driven convection in the transient liquid melt, giving an extremely high strain rate of ~106 s–1. In addition, the heat can be dissipated in small volumes within a few microseconds through thermal conduction, quenching the melt back to the solid state with cooling rates up to 108 K·s-1. We demonstrate that this approach can be utilized for the ultrafast welding of small-volume crystalline Mo (a refractory metal) and amorphous Cu49Zr51 without introducing obvious microstructural changes, distinguishing the process from bulk welding.


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About this article

Ultrafast shape change and joining of small-volume materials using nanoscale electrical discharge

Show Author's information Cheng-Cai Wang1,5, Qing-Jie Li1,4, Liang Chen1,2, Yong-Hong Cheng2, Jun Sun1, Zhi-Wei Shan1( ), Ju Li1,3( ), Evan Ma1,4( )
Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC)State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an710049China
State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an710049China
Department of Nuclear Science and Engineering and Department of Materials Science and EngineeringMassachusetts Institute of Technology77 Massachusetts AvenueCambridgeMassachusetts02139USA
Department of Materials Science and EngineeringJohns Hopkins UniversityBaltimoreMaryland21218USA
SJS Limited101 Xihuan RoadJingzhouHubei434024China

Abstract

Using nanoscale electrical-discharge-induced rapid Joule heating, we developed a method for ultrafast shape change and joining of small-volume materials. Shape change is dominated by surface-tension-driven convection in the transient liquid melt, giving an extremely high strain rate of ~106 s–1. In addition, the heat can be dissipated in small volumes within a few microseconds through thermal conduction, quenching the melt back to the solid state with cooling rates up to 108 K·s-1. We demonstrate that this approach can be utilized for the ultrafast welding of small-volume crystalline Mo (a refractory metal) and amorphous Cu49Zr51 without introducing obvious microstructural changes, distinguishing the process from bulk welding.

Keywords: nanoscale, metal, electrical discharge, welding, metallic glass

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Publication history
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Acknowledgements

Publication history

Received: 29 September 2014
Revised: 30 November 2014
Accepted: 07 December 2014
Published: 17 July 2015
Issue date: July 2015

Copyright

© Tsinghua University Press and Springer‐Verlag Berlin Heidelberg 2015

Acknowledgements

Acknowledgements

This work was supported by the grants from NSFC (Nos. 50925104, 51231005 and 51321003) and 973 (Program of China) (Nos. 2010CB631003, 2012CB619402). We also appreciate the support from the 111 Project of China (No. B06025). Both E. M. and J. L. carried out this work under an adjunct professorship at XJTU. J. L. acknowledges support by NSF (No. DMR- 1120901). E. M. was supported at JHU by US-NSF (No. DMR-0904188).

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