Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure

Abstract Pressure-induced polyamorphism in Ce-based metallic glass has attracted significant interest in condensed matter physics. In this paper, we discover that in association with the polyamorphism of La32Ce32Al16Ni5Cu15 bulk metallic glass, the acoustic velocities, measured up to 12.3 GPa using...

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Autores principales:	Xintong Qi, Yongtao Zou, Xuebing Wang, Ting Chen, David O. Welch, Jianzhong Jiang, Baosheng Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cfc71e989701492a9845534f0cf0f741
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spelling	oai:doaj.org-article:cfc71e989701492a9845534f0cf0f7412021-12-02T12:31:49ZElastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure10.1038/s41598-017-00737-02045-2322https://doaj.org/article/cfc71e989701492a9845534f0cf0f7412017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00737-0https://doaj.org/toc/2045-2322Abstract Pressure-induced polyamorphism in Ce-based metallic glass has attracted significant interest in condensed matter physics. In this paper, we discover that in association with the polyamorphism of La32Ce32Al16Ni5Cu15 bulk metallic glass, the acoustic velocities, measured up to 12.3 GPa using ultrasonic interferometry, exhibit velocity minima at 1.8 GPa for P wave and 3.2 GPa for S wave. The low and high density amorphous states are distinguished by their distinct pressure derivatives of the bulk and shear moduli. The elasticity, permanent densification, and polyamorphic transition are interpreted by the topological rearrangement of solute-centered clusters in medium-range order (MRO) mediated by the 4f electron delocalization of Ce under pressure. The precisely measured acoustic wave travel times which were used to derive the velocities and densities provided unprecedented data to document the evolution of the bulk and shear elastic moduli associated with a polyamorphic transition in La32Ce32Al16Ni5Cu15 bulk metallic glass and can shed new light on the mechanisms of polyamorphism and structural evolution in metallic glasses under pressure.Xintong QiYongtao ZouXuebing WangTing ChenDavid O. WelchJianzhong JiangBaosheng LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xintong Qi Yongtao Zou Xuebing Wang Ting Chen David O. Welch Jianzhong Jiang Baosheng Li Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure
description	Abstract Pressure-induced polyamorphism in Ce-based metallic glass has attracted significant interest in condensed matter physics. In this paper, we discover that in association with the polyamorphism of La32Ce32Al16Ni5Cu15 bulk metallic glass, the acoustic velocities, measured up to 12.3 GPa using ultrasonic interferometry, exhibit velocity minima at 1.8 GPa for P wave and 3.2 GPa for S wave. The low and high density amorphous states are distinguished by their distinct pressure derivatives of the bulk and shear moduli. The elasticity, permanent densification, and polyamorphic transition are interpreted by the topological rearrangement of solute-centered clusters in medium-range order (MRO) mediated by the 4f electron delocalization of Ce under pressure. The precisely measured acoustic wave travel times which were used to derive the velocities and densities provided unprecedented data to document the evolution of the bulk and shear elastic moduli associated with a polyamorphic transition in La32Ce32Al16Ni5Cu15 bulk metallic glass and can shed new light on the mechanisms of polyamorphism and structural evolution in metallic glasses under pressure.
format	article
author	Xintong Qi Yongtao Zou Xuebing Wang Ting Chen David O. Welch Jianzhong Jiang Baosheng Li
author_facet	Xintong Qi Yongtao Zou Xuebing Wang Ting Chen David O. Welch Jianzhong Jiang Baosheng Li
author_sort	Xintong Qi
title	Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure
title_short	Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure
title_full	Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure
title_fullStr	Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure
title_full_unstemmed	Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure
title_sort	elastic anomaly and polyamorphic transition in (la, ce)-based bulk metallic glass under pressure
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/cfc71e989701492a9845534f0cf0f741
work_keys_str_mv	AT xintongqi elasticanomalyandpolyamorphictransitioninlacebasedbulkmetallicglassunderpressure AT yongtaozou elasticanomalyandpolyamorphictransitioninlacebasedbulkmetallicglassunderpressure AT xuebingwang elasticanomalyandpolyamorphictransitioninlacebasedbulkmetallicglassunderpressure AT tingchen elasticanomalyandpolyamorphictransitioninlacebasedbulkmetallicglassunderpressure AT davidowelch elasticanomalyandpolyamorphictransitioninlacebasedbulkmetallicglassunderpressure AT jianzhongjiang elasticanomalyandpolyamorphictransitioninlacebasedbulkmetallicglassunderpressure AT baoshengli elasticanomalyandpolyamorphictransitioninlacebasedbulkmetallicglassunderpressure
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Elastic Anomaly and Polyamorphic Transition in (La, Ce)-based Bulk Metallic Glass under Pressure

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