Time-resolved atomic-scale observations of deformation and fracture of nanoporous gold under tension

Pan Liu*, Xiao Wei, Shuangxi Song, Lihua Wang, Akihiko Hirata, Takeshi Fujita, Xiaodong Han, Ze Zhang, Mingwei Chen

*この研究の対応する著者

研究成果: Article査読

24 被引用数 (Scopus)

抄録

It has been known for decades that nanopores produced by selective leaching during galvanic corrosion can lead to dramatic loss of materials ductility and strength under tension. However, the underlying atomic mechanisms of the nanopore induced embrittlement remain to be poorly known. Here we report in situ observations of the deformation and failure of dealloyed nanoporous gold by utilizing the state-of-the art aberration-corrected transmission electron microscopy and fast direct electron detection camera. Our time-resolved atomic observations reveal that the brittle failure of the nanoporous gold originates from plastic instability of individual gold ligaments by the interplay between dislocation plasticity and stress-driving surface diffusion.

本文言語English
ページ(範囲)99-108
ページ数10
ジャーナルActa Materialia
165
DOI
出版ステータスPublished - 2019 2月 15
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • ポリマーおよびプラスチック
  • 金属および合金

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