Effect of the Technological Parameters of the Aluminothermic Reduction of Erbium Oxide in Chloride–Fluoride Melts on the Transition of Erbium to a Master Alloy
- Authors: Kosov Y.I.1, Bazhin V.Y.2, Kopylova T.N.2
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Affiliations:
- NITs Kurchatovskii Institut—Central Research Institute of Structural Materials
- St. Petersburg Mining University
- Issue: Vol 2019, No 9 (2019)
- Pages: 856-862
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/173462
- DOI: https://doi.org/10.1134/S0036029519090040
- ID: 173462
Cite item
Abstract
The methods used for the preparation of an Al–Er master alloy as a promising addition to aluminum alloys for enhancing their physical and mechanical characteristics are analytically reviewed. Thermodynamic analysis of the processes that occur during master alloy fabrication in chloride–fluoride melts containing erbium oxide is carried out. Since the data on erbium complexes are lacking or restricted, the thermodynamic values are determined by indirect methods. The study of the phase composition of the chloride–fluoride melts shows that the melting of a salt mixture results in the fluorination of erbium oxide and the formation of the KEr3F10 complex, which is a precursor for erbium reduction and intermetallic compound Al3Er formation. The effect of the flux composition and the technological parameters of aluminothermic reduction on the transition of erbium to the master alloy is studied.
About the authors
Ya. I. Kosov
NITs Kurchatovskii Institut—Central Research Institute of Structural Materials
Email: bazhin-alfoil@gmail.com
Russian Federation, Prometei, St. Petersburg, 193167
V. Yu. Bazhin
St. Petersburg Mining University
Author for correspondence.
Email: bazhin-alfoil@gmail.com
Russian Federation, St. Petersburg, 199026
T. N. Kopylova
St. Petersburg Mining University
Email: bazhin-alfoil@gmail.com
Russian Federation, St. Petersburg, 199026