Chemical variation induced nanoscale spatial heterogeneity in metallic glasses

Wang, Neng; Ding, Jun; Luo, Peng; Liu, Yanhui; Li, Lin; Yan, Feng

doi:10.1080/21663831.2018.1532465

Title: Chemical variation induced nanoscale spatial heterogeneity in metallic glasses

Journal Article · Mon Oct 15 00:00:00 EDT 2018 · Materials Research Letters

DOI:https://doi.org/10.1080/21663831.2018.1532465· OSTI ID:1483320

Wang, Neng ^[1]; Ding, Jun ^[2]; Luo, Peng ^[3]; Liu, Yanhui ^[3]; Li, Lin ^[1]; Yan, Feng ^[1]

Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL, USA
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Institute of Physics, Chinese Academy of Sciences, Beijing People’s Republic of China

Metallic glasses possess amorphous structures with inherent heterogeneity at the nanoscale. A combined experimental and modeling investigation to elucidate the chemical effect on such nanoscale heterogeneity in a Cu-Zr-Al metallic glass system is conducted. By using the dynamic atomic force microscopy, we reveal a reduction of the nanoscale spatial heterogeneity in the local viscoelastic response after introducing Al into the Cu50Zr50 metallic glass. The change of such nanoscale heterogeneity can be contributed to the variation of local atomic structures. The addition of Al increases the population of the icosahedral short-range ordered clusters, thus reducing the structural heterogeneity at the nanoscale.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Univ. of Alabama, Tuscaloosa, AL (United States); Univ. of Alabama, Birmingham, AL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0016164; AC02-05CH11231

OSTI ID:: 1483320

Alternate ID(s):: OSTI ID: 1543917; OSTI ID: 1595009

Journal Information:: Materials Research Letters, Journal Name: Materials Research Letters Vol. 6 Journal Issue: 12; ISSN 2166-3831

Publisher:: Informa UK LimitedCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 17 works

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Universal nature of dynamic heterogeneity in glass-forming liquids: A comparative study of metallic and polymeric glass-forming liquids Wang, Xinyi; Xu, Wen-Sheng; Zhang, Hao The Journal of Chemical Physics, Vol. 151, Issue 18 https://doi.org/10.1063/1.5125641	journal	November 2019

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36 MATERIALS SCIENCE
Materials Science
metallic glass
spatial heterogeneity
chemical variation
dynamic force microscopy
nanoscale

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