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Focused ion beam characterization of deformation resulting from nanoindentation of nanoporous gold

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Abstract

Regions of deformation resulting from nanoindentation testing of nanoporous gold (np-Au) are characterized by cross-sectional imaging of the ligament structure directly beneath the surface, after lift-out using focused ion beam techniques. Permanent deformation of the porous structure was not exclusively confined to the region directly in contact with the indenter but extended much deeper into the sample. Implications of these observations with respect to previous measurements of the mechanical properties of np-Au are discussed. The conclusions provide initial insight into the deformation behavior of np structures during nanoindentation, as well as a basis for extending this technique to other np metals.

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Acknowledgments

This work was supported by the National Science Foundation under Grant No. DMR-0847693. The authors acknowledge the Electron Microscopy Center at the University of Kentucky for access to the FEI Helios Nanolab 660 dual-beam FIB-SEM, and Ken Wu from FEI Company.

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Authors and Affiliations

  1. Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington, KY, 40506, USA

    Nicolas J. Briot & T. John Balk

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  1. Nicolas J. Briot
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  2. T. John Balk
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Correspondence to Nicolas J. Briot.

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Briot, N.J., Balk, T.J. Focused ion beam characterization of deformation resulting from nanoindentation of nanoporous gold. MRS Communications 8, 132–136 (2018). https://doi.org/10.1557/mrc.2017.138

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  • DOI: https://doi.org/10.1557/mrc.2017.138

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