Abstract
Molten salts electrolysis method to prepare Al-RE alloys has attracted increasing attention recently. CaCl2 and Na3AlF6 were the most often used melts for this purpose. In this work, Al-Sc alloys prepared by electrolytic deposition process in both CaCl2 and Na3AlF6 melts were investigated, respectively. It was found that Sc distributes almost uniformly and Sc contents increase with increasing current intensity in both melts. Current efficiency was measured for comparison among various current densities applied. The alloy products were analyzed using XRD and SEM, where the formation behaviors of Al-Sc intermetallics were investigated in details. The experimental and theoretical results demonstrate that Al3Sc and Al0.968Sc0.032 are the major precipitates in the Al-Sc alloys prepared by molten electrolysis. The results are useful for selection and optimization of the molten salts compositions and the parameters of electrolysis operation.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
J. Röyset, “Scandium in Aluminium Alloys Overview: Physical Metallurgy, Properties and Applications,” Metallurgical Science and Technology, 25 (2) (2007), 11–21.
M. Zhang, J. Li, and J. Liang, “Preparation of Al-Sc Alloys by Molten Salt Electrolysis,” Journal of Northeastern University (Natural Science), 24 (4) (2003), 358–360 (In Chinese).
R. Guo et al., “Preparation of Al-Sc Application Alloys by Molten Salt Electrolysis Method,” Chinese Journal of Rare Metals, 32 (5) (2008), 645–648 (In Chinese).
S. Yang, Q. Li, and S. Gu, “The Thermodynamics of Electrolysis Al-Sc Alloys,” Nonferrous Metals (Extractive Metallurgy), 2 (2003), 26–29 (In Chinese).
M. Harata et al., “Electrochemical Production of Al-Sc Alloy in CaCl2-Sc2O3 Molten Salt,” Journal of Alloys and Compounds, 474 (2009), 124–130.
Q. Liu, “Preparation of Al-Sc Alloys by Electrolysis in KF-AlF3-Sc2O3 Melts System”, Doctoral thesis, (2012), 104–110(In Chinese).
K. Hyde, A. Norman, P. Prangnell, “The Growth Morphology and Nucleation Mechanism of Primary L12 Al3Sc Particles in Al-Sc alloys,” Materials Science Forum, 331(5) (2000), 1015–1018.
M. Gabriel, J. Alan, “Precipitation of Al3Sc in Binary Al-Sc alloys,” Materials Science and Engineering, 318 (5) (2001), 144–154.
E. Marquis, D. Seidman, “Nanoscale Structural Evolution of Al3Sc Precipitates in Al(Sc) Alloys,” Acta Meterialia, 49 (22) (2001), 1909–1919.
J. Robson, M. Jones, “Prangnell P B. Extension of the N-model to Predict Competing Homogeneous and Heterogeneous Precipitation in Al-Sc Alloys,” Acta Meterialia, 51 (5) (2003), 1453–1468.
S. Iwamura, Y. Miura, “Loss in Coherency and Coarsening Behavior of Al3Sc precipitates,” Acta Materialia, 52 (12) (2004), 591–600.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 TMS (The Minerals, Metals & Materials Society)
About this chapter
Cite this chapter
Wang, Z., Guan, C., Liu, Q., Xue, J. (2015). Formation of Intermetallic Phases in Al-Sc Alloys Prepared by Molten Salt Electrolysis at Elevated Temperatures. In: Jiang, T., et al. 6th International Symposium on High-Temperature Metallurgical Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48217-0_28
Download citation
DOI: https://doi.org/10.1007/978-3-319-48217-0_28
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48603-1
Online ISBN: 978-3-319-48217-0
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)