Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility

Abstract Magnesium-based bulk metallic glasses (BMGs) exhibit high specific strengths and excellent glass-forming ability compared to other metallic systems, making them suitable candidates for next-generation materials. However, current Mg-based BMGs tend to exhibit low thermal stability and are pr...

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Autores principales:	Kevin J. Laws, Karl F. Shamlaye, Davide Granata, Leah S. Koloadin, Jörg F. Löffler
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/777662e40dc947c5b017f03f8f705616
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spelling	oai:doaj.org-article:777662e40dc947c5b017f03f8f7056162021-12-02T15:05:09ZElectron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility10.1038/s41598-017-03643-72045-2322https://doaj.org/article/777662e40dc947c5b017f03f8f7056162017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03643-7https://doaj.org/toc/2045-2322Abstract Magnesium-based bulk metallic glasses (BMGs) exhibit high specific strengths and excellent glass-forming ability compared to other metallic systems, making them suitable candidates for next-generation materials. However, current Mg-based BMGs tend to exhibit low thermal stability and are prone to structural relaxation and brittle failure. This study presents a range of new magnesium–precious metal-based BMGs from the ternary Mg–Ag–Ca, Mg–Ag–Yb, Mg–Pd–Ca and Mg–Pd–Yb alloy systems with Mg content greater than 67 at.%. These alloys were designed for high ductility by utilising atomic bond-band theory and a topological efficient atomic packing model. BMGs from the Mg–Pd–Ca alloy system exhibit high glass-forming ability with critical casting sizes of up to 3 mm in diameter, the highest glass transition temperatures (>200 °C) of any reported Mg-based BMG to date, and sustained compressive ductility. Alloys from the Mg–Pd–Yb family exhibit critical casting sizes of up to 4 mm in diameter, and the highest compressive plastic (1.59%) and total (3.78%) strain to failure of any so far reported Mg-based glass. The methods and theoretical approaches presented here demonstrate a significant step forward in the ongoing development of this extraordinary class of materials.Kevin J. LawsKarl F. ShamlayeDavide GranataLeah S. KoloadinJörg F. LöfflerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kevin J. Laws Karl F. Shamlaye Davide Granata Leah S. Koloadin Jörg F. Löffler Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility
description	Abstract Magnesium-based bulk metallic glasses (BMGs) exhibit high specific strengths and excellent glass-forming ability compared to other metallic systems, making them suitable candidates for next-generation materials. However, current Mg-based BMGs tend to exhibit low thermal stability and are prone to structural relaxation and brittle failure. This study presents a range of new magnesium–precious metal-based BMGs from the ternary Mg–Ag–Ca, Mg–Ag–Yb, Mg–Pd–Ca and Mg–Pd–Yb alloy systems with Mg content greater than 67 at.%. These alloys were designed for high ductility by utilising atomic bond-band theory and a topological efficient atomic packing model. BMGs from the Mg–Pd–Ca alloy system exhibit high glass-forming ability with critical casting sizes of up to 3 mm in diameter, the highest glass transition temperatures (>200 °C) of any reported Mg-based BMG to date, and sustained compressive ductility. Alloys from the Mg–Pd–Yb family exhibit critical casting sizes of up to 4 mm in diameter, and the highest compressive plastic (1.59%) and total (3.78%) strain to failure of any so far reported Mg-based glass. The methods and theoretical approaches presented here demonstrate a significant step forward in the ongoing development of this extraordinary class of materials.
format	article
author	Kevin J. Laws Karl F. Shamlaye Davide Granata Leah S. Koloadin Jörg F. Löffler
author_facet	Kevin J. Laws Karl F. Shamlaye Davide Granata Leah S. Koloadin Jörg F. Löffler
author_sort	Kevin J. Laws
title	Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility
title_short	Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility
title_full	Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility
title_fullStr	Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility
title_full_unstemmed	Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility
title_sort	electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/777662e40dc947c5b017f03f8f705616
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Electron-band theory inspired design of magnesium–precious metal bulk metallic glasses with high thermal stability and extended ductility

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