Uniaxial compression testing of bulk nanoporous gold

Michael Bürckert, Nicolas J. Briot, T. John Balk

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The mechanical properties of bulk nanoporous gold (np–Au) with a relative density of 0.35 were investigated by compression testing of millimetre-scale specimens. Young’s modulus, Poisson’s ratio and yield strength values were determined from uniaxial, quasi-static experiments using a custom-built mechanical testing system. The cuboid-shaped specimens were fabricated following a specific, controlled process (including cutting and grinding) that guaranteed a precise and repeatable geometry. The np–Au structure was created from a silver–gold alloy by electrochemical dealloying in nitric acid. Mechanical properties obtained from compression testing are compared to values reported in the literature and to scaling relations. Values are found to agree with a recently proposed scaling relation for the yield strength of np–Au that incorporates a ligament size effect and a modified scaling exponent.

Original languageEnglish
Pages (from-to)1157-1178
Number of pages22
JournalPhilosophical Magazine
Volume97
Issue number15
DOIs
StatePublished - May 24 2017

Bibliographical note

Publisher Copyright:
© 2017 Informa UK Limited, trading as Taylor & Francis Group.

Keywords

  • Nanoporous gold
  • compressive testing
  • material behaviour
  • mechanical properties
  • scaling law

ASJC Scopus subject areas

  • Condensed Matter Physics

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