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Related Concept Videos

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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How Many Bulk Metallic Glasses Are There?

Yanglin Li1, Shaofan Zhao1, Yanhui Liu2

  • 1Department of Mechanical Engineering and Material Science, Yale University New Haven, Connecticut 06511, United States.

ACS Combinatorial Science
|September 14, 2017
PubMed
Summary

Predicting metallic glass (MG) and bulk metallic glass (BMG) formation is challenging. This study uses alloy design rules based on atomic size ratio, heat of mixing, and liquidus temperature to estimate millions of potential BMG alloys.

Keywords:
bulk metallic glassescombinatorial materials sciencecomplex alloysstatistical analysis

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Computational Materials Science

Background:

  • Predicting the glass-forming ability (GFA) of metallic alloys is crucial for developing new metallic glasses (MGs).
  • Traditional methods often struggle with the complexity of glass formation, especially in multi-component systems.
  • Developing MGs with specific properties, particularly bulk metallic glasses (BMGs), requires efficient methods to screen potential alloy compositions.

Purpose of the Study:

  • To quantitatively predict the formation of metallic glasses (MGs) and bulk metallic glasses (BMGs) using a priori known parameters.
  • To establish empirical alloy design rules for estimating the number of potential MG and BMG forming systems and alloys.
  • To reduce the vast compositional space for BMG formation and identify promising alloy candidates.

Main Methods:

  • Utilizing empirically determined alloy design rules based on a priori known parameters.
  • Quantifying atomic size ratio, heat of mixing, and liquidus temperature for binary glasses and centimeter-sized BMGs.
  • Expanding analysis to higher-order systems involving 32 practical elements and developing criteria to reduce the composition space.

Main Results:

  • The study estimates the number of potential metallic glass and bulk metallic glass forming systems and alloys.
  • Developed criteria reduced the composition space for BMG formation by a factor of 10^6.
  • Approximately 3 million binary, ternary, quaternary, and quinary BMG alloys were estimated.

Conclusions:

  • Empirically determined alloy design rules, considering atomic size ratio, heat of mixing, and liquidus temperature, provide a viable approach for predicting metallic glass formation.
  • This method significantly narrows down the search space for bulk metallic glasses, enabling more efficient discovery of new alloys.
  • The estimation of millions of potential BMG alloys highlights the vast opportunities for developing advanced metallic materials.