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Metallic Glasses and Amorphous Alloys: Recent Advances and Future Prospects

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 950

Special Issue Editor


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Guest Editor
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Interests: metallic glasses; mechanical and magnetic properties; structure relaxation
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Special Issue Information

Dear Colleagues,

Over the last two decades, metallic glasses, also known as amorphous alloys, have received extensive research interest owing to their unique and desirable properties in terms of engineering applications, including large elastic strain limit, high strength, low Young's modulus, and excellent wear and corrosion resistance. We are pleased to announce a Special Issue on the recent advances in and future prospects of metallic glasses, focusing mainly on glass formation, structure evolution, as well as mechanical and magnetic properties. In addition, this Special Issue will present discussions of advanced characterization techniques used to analyze and understand metallic glasses, including experimental methods, simulations, and theoretical expressions.

We welcome the submission of full papers, theoretical studies, communications, and reviews to this Special Issue.

Prof. Dr. Weihuo Li
Guest Editor

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Keywords

  • amorphous alloys
  • magnetic/mechanical properties
  • microstructures
  • nanoindentation
  • structure relaxation
  • simulation
  • synthesis

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Published Papers (1 paper)

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Research

14 pages, 3743 KiB  
Article
Synthesis of Nanocrystal-Embedded Bulk Metallic Glass Composites by a Combination of Mechanical Alloying and Vacuum Hot Pressing
by Pee-Yew Lee, Pei-Jung Chang, Chin-Yi Chen and Chung-Kwei Lin
Materials 2025, 18(2), 360; https://doi.org/10.3390/ma18020360 - 14 Jan 2025
Viewed by 612
Abstract
Bulk metallic glasses (i.e., BMGs) have attracted a lot of research and development interest due to their unique properties. Embedding BMG composites with nanocrystals can further extend their applications. In this study, Ta-nanocrystal-embedded metallic glass powder was prepared via the mechanical alloying of [...] Read more.
Bulk metallic glasses (i.e., BMGs) have attracted a lot of research and development interest due to their unique properties. Embedding BMG composites with nanocrystals can further extend their applications. In this study, Ta-nanocrystal-embedded metallic glass powder was prepared via the mechanical alloying of (Cu60Zr30Ti10)91Ta9 composition for 5 h using starting elemental powders. The structural evolution during the mechanical alloying process was examined using X-ray diffraction, scanning electron microscopy, synchrotron extended X-ray absorption fine structure, transmission electron microscopy, and differential scanning calorimetry. The 5 h as-milled powder was then consolidated into a bulk sample using vacuum hot pressing with an applied pressure of 0.72, 0.96, and 1.20 GPa. The effects of the applied pressure during vacuum hot pressing on the structure of the obtained BMG were investigated. The experimental results show that Ta-nanocrystal-embedded metallic glass composite powder was prepared successfully after 5 h of mechanical alloying. The 5 h as-milled composite powder exhibited a large supercooled region of 43 K between the glass transition temperature of 743 K and the crystallization temperature of 786 K. Using vacuum hot pressing at 753 K for 30 mins with an applied pressure, dense nanocrystal-embedded BMG composites were synthesized. The relative density and the crystallization temperature of the BMG composites increased with increasing applied pressure. The nanocrystal-embedded BMG composites prepared at 753 K for 30 mins with an applied pressure of 1.20 GPa exhibited a relative density of 98.3% and a crystallization temperature of 786 K. These nanocrystals were Ta, Cu51Zr14, and other possible Cu–Zr–Ti alloys (e.g., Cu10Zr7) that were randomly dispersed within the glassy matrix. Full article
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