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Effects of sub-T-g annealing on Cu64.5Zr35.5 glasses: A molecular dynamics study

TitleEffects of sub-T-g annealing on Cu64.5Zr35.5 glasses: A molecular dynamics study
Publication TypeJournal Article
Year of Publication2014
AuthorsZhang, F, Mendelev, MI, Zhang, Y, Wang, CZ, Kramer, MJ, Ho, KM
JournalApplied Physics Letters
Volume104
Pagination061905
Date Published02
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000331803800028
Keywordsalloys, bulk metallic-glass, liquid, Medium-range order
Abstract

Creating metallic glasses by cooling liquid melts in molecular dynamics simulations faces a well-known challenge that the cooling rate is too fast compared with experiments. Taking the prototypical Cu64.5Zr35.5 glasses as an example, we propose an efficient cooling strategy in which most of the computer time is spent on a prolonged isothermal process slightly below the glass-transition temperature, T-g. The glassy sample prepared in this way demonstrates significant energetic stability, slow dynamics, and well-developed short-range icosahedral order. By conventional uniform cooling, similar properties can only be obtained using a cooling rate more than 15 times slower. (C) 2014 AIP Publishing LLC.

DOI10.1063/1.4864652
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Structures and Dynamics