Haque, N orcid.org/0000-0002-0271-9209, Cochrane, RF and Mullis, AM orcid.org/0000-0002-5215-9959 (2017) Morphology of order-disorder structures in rapidly solidified L12 intermetallics. In: TMS 2017 Conference Proceedings (Frontiers in Solidification Science). TMS 2017 Spring Meeting, 26 Feb - 02 Mar 2017, San Diego, US. Springer International Publishing , pp. 729-736. ISBN 978-3-319-51493-2
Abstract
Utilization of intermetallics in high temperature applications is limited due to their poor room temperature ductility. One route to overcoming this is disorder trapping (and subsequent anti-phase domain formation) during rapid solidification, motivating the study of disorder trapping in intermetallics. The single-phase, L1₂ intermetallic beta-Ni₃Ge has been rapidly solidified via drop-tube processing. At low cooling rates (850 – 500 um diameter particles, 700 – 2800 K/s) the dominant solidification morphology, revealed after etching, is that of isolated spherulites in an otherwise featureless matrix. Selected area diffraction analysis in the TEM reveals the spherulites to be partially disordered beta-Ni₃Ge, whilst the featureless matrix is the fully ordered variant of the same compound. Dark-field TEM imaging has confirmed that the spherulites grow as radially emanating fingers of the ordered phase, with disordered material in the space between the fingers.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Minerals, Metals & Materials Society 2017. This is an author produced version of a paper published in TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Intermetallics; Drop-tube; Spherulites; Rapid Solidification; Disorder Trapping |
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: | 14 Dec 2016 15:42 |
Last Modified: | 31 Jan 2019 12:25 |
Status: | Published |
Publisher: | Springer International Publishing |
Identification Number: | 10.1007/978-3-319-51493-2_70 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:109299 |