Size Effect Suppresses Brittle Failure in Hollow Cu_(60)Zr_(40) Metallic Glass Nanolattices Deformed at Cryogenic Temperatures
Abstract
To harness "smaller is more ductile" behavior emergent at nanoscale and to proliferate it onto materials with macroscale dimensions, we produced hollow-tube Cu_(60)Zr_(40) metallic glass nanolattices with the layer thicknesses of 120, 60, and 20 nm. They exhibit unique transitions in deformation mode with tube-wall thickness and temperature. Molecular dynamics simulations and analytical models were used to interpret these unique transitions in terms of size effects on the plasticity of metallic glasses and elastic instability.
Additional Information
© 2015 American Chemical Society. Received: March 16, 2015; Revised: August 11, 2015; Publication Date (Web): August 11, 2015. The authors gratefully acknowledge the financial support of the NASA's Space Technology Research Grants Program through J.R.G.'s Early Career grant. The authors also acknowledge support and infrastructure provided by the Kavli Nanoscience Institute (KNI) at Caltech. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1144469. Any opinion, findings, and conclusions or recommendations expressed in the material are those of the authors(s) and do not necessarily reflect the views of the National Science Foundation. M.J.-Z. and Y.-W.Z. gratefully acknowledge the financial support from the Agency for Science, Technology and Research (A*STAR), Singapore and the use of computing resources at the A*STAR Computational Resource Centre, Singapore. Author Contributions: S.-W.L. fabricated the Cu_(60)Zr_(40) metallic glass nanolattices and carried out the in situ tensile experiments, EDX, SEM, and TEM analysis. D.Z.C. performed EDX analysis and trained S.-W.L. on nanolattices fabrication techniques including two-photon lithography and sputter deposition. M.J.-Z. and Y.-W.Z. developed and performed the MD simulations. S.-W.L., D.Z.C., and J.R.G. interpreted the results, and S.-W.L. wrote the manuscript with input from D.Z.C., J.R.G., M.J.-Z., and Y.-W.Z. S.-W.L. designed the experiments, and J.R.G. supervised the project. M.J.-Z. and Y.-W.Z. designed the simulations. Funding was provided by NASA Early Career Grant National Science Foundation Graduate Research Fellowship under Grant No. DGE-1144469. The authors declare no competing financial interest.Attached Files
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Additional details
- Alternative title
- Size Effect Suppresses Brittle Failure in Hollow Cu60Zr40Metallic Glass Nanolattices Deformed at Cryogenic Temperatures
- Eprint ID
- 59851
- DOI
- 10.1021/acs.nanolett.5b01034
- Resolver ID
- CaltechAUTHORS:20150824-125516097
- NASA
- Kavli Nanoscience Institute
- DGE-1144469
- NSF Graduate Research Fellowship
- Agency for Science, Technology and Research (A*STAR)
- Created
-
2015-08-24Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute