Haque, N, Jegede, OE and Mullis, AM orcid.org/0000-0002-5215-9959 (2021) Presence of έ and ε crystal structures in rapidly solidified intermetallic compound Ni5Ge3. Journal of Alloys and Compounds, 887. 161465. ISSN 0925-8388
Abstract
The congruently melting, single phase intermetallic Ni5Ge3 has been subject to rapid solidification via drop-tube processing wherein powders, with diameters between> 850 and 150 µm, are produced. At low cooling rates (> 850 µm diameter particles,< 700 K s−1) the dominant solidification morphology, revealed after etching, is that of partial plate and lath microstructure in an otherwise featureless matrix. At slightly high cooling rates (850–150 µm diameter particles, 700–7800 K s−1) complete plate & lath microstructure observed, again imbedded within a featureless matrix. Selected area diffraction analysis in the TEM reveals that partial plate & lath are the disordered form of έ-Ni5Ge3 in a matrix of the ordered (double-superlattice) form. Partial plate & lath has a very different EBSD to the plate & lath structure. Histogram of the correlated grain orientation angle distribution across grain orientation in partial plate & lath microstructure sample from the> 850 µm fraction showing random grain orientation. However, grain orientation in plate & lath structure from 300 to 212 µm fraction displaying the distribution predominance of low angle grain boundaries.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Elsevier B.V. All rights reserved. This is an author produced version of an article published in Journal of Alloys and Compounds. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Rapid solidification; Intermetallic compound; Plate & lath microstructure |
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: | 13 Sep 2021 13:19 |
Last Modified: | 08 Aug 2022 00:13 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jallcom.2021.161465 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:178053 |