High-entropy metallic glasses

Akira Takeuchi, Michael C. Gao, Junwei Qiao, Michael Widom

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

This chapter applies the concept of high entropy to metallic glasses (MGs), in particular, to those in a bulk shape: bulk metallic glasses (BMGs). The resultant target materials in this chapter are mainly high-entropy bulk metallic glasses (HE-BMGs), which have recently been developed as alloys with characteristics of both high-entropy alloys (HEAs) and BMGs. The contents in this chapter start by introducing historic background of HE-BMGs and by summarizing the differences between HEAs and BMGs. Then, the fundamental properties of representative HE-BMGs found to date are described mainly in terms of thermodynamic and mechanical behaviors. Besides the experiments, the latest computational approach for clarifying the features of HE-BMGs is described based on the results using ab initio molecular dynamics simulations for the atomic structure, chemical interaction, and diffusivity in this unique class of materials. The current status and future prospects of the HE-BMGs by utilizing their unique features are outlined for their future applications.

Original languageEnglish
Title of host publicationHigh-Entropy Alloys
Subtitle of host publicationFundamentals and Applications
PublisherSpringer International Publishing
Pages445-468
Number of pages24
ISBN (Electronic)9783319270135
ISBN (Print)9783319270111
DOIs
Publication statusPublished - 2016 Jan 1

Keywords

  • Ab initio molecular dynamics simulations (AIMD)
  • Amorphous
  • Atomic size difference
  • Bulk metallic glasses (BMGs)
  • Diffusion constants
  • Enthalpy of mixing
  • Entropy of mixing
  • Glass-forming ability
  • High-entropy alloys (HEAs)
  • Kinetics
  • Multiphase
  • Phase diagrams
  • Phase stability
  • Phase transformations
  • Solidification
  • Thermodynamics

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Biochemistry, Genetics and Molecular Biology(all)

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  • Cite this

    Takeuchi, A., Gao, M. C., Qiao, J., & Widom, M. (2016). High-entropy metallic glasses. In High-Entropy Alloys: Fundamentals and Applications (pp. 445-468). Springer International Publishing. https://doi.org/10.1007/978-3-319-27013-5_13