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Title: | Thermodynamics of Mg–Y–O Alloys and Segregation at the Mg/MgO Interface |
Authors: | Schmid-Fetzer, R Wang, S Fan, Z |
Keywords: | thermodynamics;nucleation potency;grain refinement;ICME |
Issue Date: | 3-Feb-2024 |
Publisher: | Springer Nature |
Citation: | Schmid-Fetzer, R., Wang, S. and Fan, Z. (2024) 'Thermodynamics of Mg–Y–O Alloys and Segregation at the Mg/MgO Interface', in Leonard, A. et al. (eds.) Magnesium Technology 2024. TMS 2024 (Minerals, Metals and Materials Series (MMMS)). Cham: Springer Nature, pp. 179 - 184. doi: 10.1007/978-3-031-50240-8_35. |
Series/Report no.: | The Minerals, Metals & Materials Series (MMMS); |
Abstract: | Elemental segregation driven by the reduction of the total Gibbs energy of the system has been widely observed at the melt/substrate interfaces in various Al- and Mg alloys containing different inoculant particles. This study provides experimental observations, analyses, and identifications of the formation of Y-segregation 2DCs at the Mg/MgO interfaces in a solidified Mg–0.5Y (w%) sample. From an extended Gibbs adsorption isotherm, the interfacial segregation of solute Y in a dilute Mg alloy melt is quantitatively described. The thermodynamics of the elemental interactions, conditions for the formation of MgO and Y2O3 particles, and the contributions to the interfacial energy difference are detailed. A reasonable atomic segregation factor at the liquid/MgO interface from the bulk Mg–0.5Y melt is estimated. This changes the structural and chemical configuration at the interface, thus the nucleation potency of native MgO particles as well as the as-cast grain size. |
Description: | Conference paper presented at The Magnesium Technology Symposium at the TMS Annual Meeting & Exhibition Conference, Orlando, FL, USA Conference, 4-6 Mar 2024. |
URI: | https://bura.brunel.ac.uk/handle/2438/28838 |
DOI: | https://doi.org/10.1007/978-3-031-50240-8_35 |
ISBN: | 978-3-031-50239-2 (hbk) 978-3-031-50240-8 (ebk) |
ISSN: | 2367-1181 |
Other Identifiers: | ORCiD: Rainer Schmid-Fetzer https://orcid.org/0000-0002-0559-1941 ORCiD: Shihao Wang https://orcid.org/0000-0003-2645-2075 ORCiD: Zhongyun Fan https://orcid.org/0000-0003-4079-7336 |
Appears in Collections: | Brunel Centre for Advanced Solidification Technology (BCAST) |
Files in This Item:
File | Description | Size | Format | |
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FullText.pdf | Embargoed until 3 February 2025 | 1.04 MB | Adobe PDF | View/Open |
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