Correlation between Local Structure Order and Spatial Heterogeneity in a Metallic Glass

Fan Zhu, Akihiko Hirata, Pan Liu, Shuangxi Song, Yuan Tian, Jiuhui Han, Takeshi Fujita, Mingwei Chen

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Although nanoscale spatial heterogeneity of metallic glasses has been demonstrated by extensive experimental and theoretical investigations, the nature of spatial heterogeneity remains poorly known owing to the absence of a structural depiction of the inhomogeneity from experimental insight. Here we report the experimental characterization of the spatial heterogeneity of a metallic glass by utilizing state-of-the-art angstrom-beam electron diffraction and scanning transmission electron microscopy. The subnanoscale electron diffraction reveals that the nanoscale spatial heterogeneity and corresponding density fluctuation have a close correlation with the local structure variation from icosahedronlike to tetragonal crystal-like order. The structural insights of spatial heterogeneity have important implications in understanding the properties and dynamics of metallic glasses.

Original languageEnglish
Article number215501
JournalPhysical Review Letters
Volume119
Issue number21
DOIs
Publication statusPublished - 2017 Nov 20
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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