Mullis, AM and Clopet, CR (2018) On the Origin of Anomalous Eutectic Growth from Undercooled Melts: Why Re-melting is not a Plausible Explanation. Acta Materialia, 145. pp. 186-195. ISSN 1359-6454
Abstract
Ag-Cu melt at the equilibrium eutectic composition has been undercooled using a melt fluxing technique. The resulting samples have been sectioned through the nucleation point and the spatial distribution of anomalous eutectic has been quantified. This is shown to be highly inhomogeneous, with the volume of anomalous material decreasing approximately linearly with distance from the nucleation site. In samples at low undercooling the volume fraction of anomalous eutectic near the nucleation site is around an order of magnitude greater than the calculated recalescence solid fraction. As such, any model for the origin of the anomalous eutectic invoking partial remelting of this initial solid is shown to be infeasible. An alternative model, based on a kinetic shift of the eutectic point during rapid solidification is proposed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Acta Materialia Inc. Published by Elsevier Ltd. This is an author produced version of a paper published in Acta Materialia. Uploaded in accordance with the publisher's self-archiving policy. This manuscript version is made available under the Creative Commons CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. |
Keywords: | Rapid solidification; Anomalous eutectic; Image analysis |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Dec 2017 10:21 |
Last Modified: | 02 Aug 2019 14:53 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.actamat.2017.12.016 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125425 |