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High-Entropy Metallic Glasses

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High-Entropy Alloys

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.

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Acknowledgments

A.T. acknowledges Japan Society for the Promotion of Science (JSPS) for financial support: Grants-in-Aid for Scientific Research (B) with a program title of “Fabrication of High-Entropy Bulk Metallic Glasses based on Confusion Principle, Clarification of their Properties and their Application” (grant number 24360284). M.C.G. acknowledges the financial support by the Cross-Cutting Technologies Program at the National Energy Technology Laboratory (NETL) – Strategic Center for Coal, managed by Robert Romanosky (Technology Manager) and Charles Miller (Technology Monitor). The Research was executed through NETL’s Office of Research and Development’s Innovative Process Technologies (IPT) Field Work Proposal under the RES contract DE-FE-0004000. M.W. acknowledges support from the DOE under grant DE-SC0014506.

Disclaimer This chapter co-authored by M.C.G. was funded by the Department of Energy, National Energy Technology Laboratory, an agency of the United States Government, through a support contract with AECOM. Neither the United States Government nor any agency thereof, nor any of their employees, nor AECOM, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

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Authors and Affiliations

  1. Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan

    Akira Takeuchi

  2. National Energy Technology Lab/AECOM, Albany, OR, 97321-2198, USA

    Michael C. Gao

  3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China

    Junwei Qiao

  4. Department of Physics, Carnegie Mellon University, Pittsburgh, PA, USA

    Michael Widom

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  1. Akira Takeuchi
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Correspondence to Akira Takeuchi .

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Editors and Affiliations

  1. National Energy Technology, Laboratory & AECOM, Albany, Oregon, USA

    Michael C. Gao

  2. Department of Materials Science and Eng, National Tsing Hua University, Hsinchu, Taiwan

    Jien-Wei Yeh

  3. Department of Materials Science and Eng, The University of Tennessee, KNOXVILLE, Tennessee, USA

    Peter K. Liaw

  4. State Key Laboratory for Advanced Metal, University of Science and Technology, Beijing, China

    Yong Zhang

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Takeuchi, A., Gao, M.C., Qiao, J., Widom, M. (2016). High-Entropy Metallic Glasses. In: Gao, M., Yeh, JW., Liaw, P., Zhang, Y. (eds) High-Entropy Alloys. Springer, Cham. https://doi.org/10.1007/978-3-319-27013-5_13

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