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Confirmation of Anomalous Nucleation in Zirconium

Bracker, G.P. and Schneider, Stephan and Wunderlich, R. and Fecht, H.-J. and Zhao, J. and Hyers, R.W. (2020) Confirmation of Anomalous Nucleation in Zirconium. JOM: Journal of the Minerals, Metals and Materials Society. Springer. doi: 10.1007/s11837-020-04257-7. ISSN 1047-4838.

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Official URL: https://link.springer.com/article/10.1007/s11837-020-04257-7

Abstract

Pure, low-oxygen zirconium samples have been observed to nucleate a solid phase under conditions during which the sample was expected to remain liquid. This phenomenon was first seen during Spacelab Mission MSL-1R (materials science laboratory) experiments and has since also been observed in the International Space Station (ISS) electromagnetic levitation (EML) facility on a different sample. Current work has been able to replicate these anomalous solidification events under a range of conditions in the ISS MSL-EML facility. The solidification events are not well explained by classical homogeneous or heterogeneous nucleation. The current theory is that collapsing voids in the melt create a local region of high pressure that results in local material being deeply undercooled and a strong driving force for solidification.

Item URL in elib:https://elib.dlr.de/135540/
Document Type:Article
Title:Confirmation of Anomalous Nucleation in Zirconium
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bracker, G.P.University of Massachusetts, AmherstUNSPECIFIED
Schneider, StephanStephan.Schneider (at) dlr.deUNSPECIFIED
Wunderlich, R.Universität Ulm, DeutschlandUNSPECIFIED
Fecht, H.-J.Universität Ulm, DeutschlandUNSPECIFIED
Zhao, J.University of Massachusetts, AmherstUNSPECIFIED
Hyers, R.W.University of Massachusetts, AmherstUNSPECIFIED
Date:6 July 2020
Journal or Publication Title:JOM: Journal of the Minerals, Metals and Materials Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1007/s11837-020-04257-7
Publisher:Springer
ISSN:1047-4838
Status:Published
Keywords:EML, electromagnetic Levitation, microgravity
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: Schneider, Dr.rer.nat. Stephan
Deposited On:20 Jul 2020 10:04
Last Modified:23 Jul 2020 11:23

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