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Structural changes during a liquid-liquid transition in the deeply undercooled Zr58.5Cu15.6Ni12.8Al10.3Nb2.8 bulk metallic glass forming melt

Stolpe, M and Jonas, I and Wei, S and Hambree, W and Evenson, Z and Yang, F and Meyer, A and Busch, R (2016) Structural changes during a liquid-liquid transition in the deeply undercooled Zr58.5Cu15.6Ni12.8Al10.3Nb2.8 bulk metallic glass forming melt. Physical Review B. American Physical Society. DOI: 10.1103/PhysRevB.93.014201 ISSN 1098-0121

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Abstract

Using high energy synchrotron x-ray radiation combined with electrostatic levitation, in situ structural analysis of a bulk metallic glass forming liquid is performed from above the liquidus temperature down to the glass transition. The data indicate a liquid-liquid transition (LLT) in the deeply undercooled state at T/Tg∼1.2 which manifests as a maximum in the heat capacity and an abrupt shift in the first peak position of the total structure factor in the absence of a pronounced density change. Analysis of the corresponding real-space data shows that the LLT involves changes in short- and medium-range order. The structural changes on the length scale of medium-range order imply a fragile-strong transition in agreement with experimental viscosity data.

Item URL in elib:https://elib.dlr.de/109867/
Document Type:Article
Title:Structural changes during a liquid-liquid transition in the deeply undercooled Zr58.5Cu15.6Ni12.8Al10.3Nb2.8 bulk metallic glass forming melt
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stolpe, MUNSPECIFIEDUNSPECIFIED
Jonas, IUNSPECIFIEDUNSPECIFIED
Wei, SUNSPECIFIEDUNSPECIFIED
Hambree, WUNSPECIFIEDUNSPECIFIED
Evenson, ZUNSPECIFIEDUNSPECIFIED
Yang, FUNSPECIFIEDUNSPECIFIED
Meyer, Ainstitut für materialphysik im weltraum, deutsches zentrum für luft- und raumfahrt (dlr), 51170 köln, germanyUNSPECIFIED
Busch, RUNSPECIFIEDUNSPECIFIED
Date:January 2016
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1103/PhysRevB.93.014201
Publisher:American Physical Society
ISSN:1098-0121
Status:Published
Keywords:x-ray, liquid-liquid transition
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialforschung und Mikrogravitation (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Prochnow, Kim
Deposited On:03 Jan 2017 08:58
Last Modified:06 Sep 2019 15:29

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