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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 2469-9950.

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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 AuthorsAuthor's ORCID iDORCID Put Code
Stolpe, MUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jonas, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wei, SUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hambree, WUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Evenson, ZUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yang, FUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meyer, Ainstitut für materialphysik im weltraum, deutsches zentrum für luft- und raumfahrt (dlr), 51170 köln, germanyUNSPECIFIEDUNSPECIFIED
Busch, RUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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:Yes
DOI:10.1103/PhysRevB.93.014201
Publisher:American Physical Society
ISSN:2469-9950
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 - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Hardt, Kim
Deposited On:03 Jan 2017 08:58
Last Modified:19 Oct 2021 09:54

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