Atomic structures of Zr-based metallic glasses

Xi Dong Hui, Xiong Jun Liu, Rui Gao, Huai Yu Hou, Hua Zhi Fang, Zi Kui Liu, Guo Liang Chen

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

The atomic structures of Zr-Ni and Zr-Ti-Al-Cu-Ni metallic glasses were investigated by using classical molecular dynamic (MD), reverse Monte Carlo (RMC), ab initio MD (AIMD) simulations and high resolution transmission electron microscopy (HRTEM) techniques. We focused on the short-range order (SRO) and medium-range order (MRO) in the glassy structure. It is shown that there are icosahedral, FCC-and BCC-type SROs in the Zr-based metallic glasses. A structural model, characterized by imperfect ordered packing (IOP), was proposed based on the MD simulation and confirmed by the HRTEM observation. Furthermore, the evolution from IOP to nanocrystal during the crystallization of metallic glasses was also explored. It is found that the growth from IOP to nanocrystal proceeds through three distinct stages: the formation of quasi-ordered structure with one-dimensional (1D) periodicity, then 2D periodicity, and finally the formation of 3D nanocrystals. It is also noted that these three growth steps are crosslinked.

Original languageEnglish (US)
Pages (from-to)400-413
Number of pages14
JournalScience in China, Series G: Physics, Mechanics and Astronomy
Volume51
Issue number4
DOIs
StatePublished - Apr 1 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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