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ArticleName Production of rich aluminum master alloys containing scandium, yttrium and zirconium for non-ferrous and ferrous metallurgy
DOI 10.17580/tsm.2020.08.06
ArticleAuthor Yatsenko S. P., Skachkov V. М., Pasechnik L. А.

Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia:

S. P. Yatsenko, Principal Researcher, Professor, Doctor of Chemical Sciences, e-mail:
V. М. Skachkov, Senior Researcher, Candidate of Chemical Sciences
L. А. Pasechnik, Leading Scientific Researcher, Candidate of Chemical Sciences


The method for the synthesis of aluminum based master alloys and alloys, which employs the high-temperature exchange reaction between fluoridechloride melt of alkaline or alkaline-earth elements and fluoride, oxide or oxyfluoride of the corresponding metal (scandium, yttrium, zirconium) with molten aluminum metal, is considered. The use of high temperatures leads to a large loss of fluoride-chloride salts of alkaline metals, and experiments for the enhancement of the percentage of alloying component finally result in an abrupt reduction of direct metallurgical yield. The mass ratio of salt melt to aluminum melt determined by the solubility of chosen compounds is established. At the salt : metal ratio less than 1:1, the process of reduction of introduced metal is retarded. The study of the kinetics of high-temperature exchange reactions of metals from salt melt at different temperatures shows that after the beginning of melting of fusible components of salt flux (~580 oC) the interaction with still hard aluminum already begins. However, this solid-phase reaction dies down quickly because the aluminum particles are covered by reaction products. The subsequent melting of aluminum is accompanied by a rapid destruction of the oxide film and acceleration of the exchange reaction, which also fades out quickly due to impediments connected with diffusion — the compounds, formed on liquid aluminum, block the way to initial substances. This limits the amount of metal introduced in aluminum using high-temperature exchange reactions. Scandium, yttrium and zirconium rich aluminum master alloys were obtained by the centrifugation methods. Al – Sc master alloy with scandium content 25 wt.% was produced by filtering of aluminum-scandium melt through graphitized fabrics. The manufacturability of the centrifugation method for the production of aluminum-scandium, aluminum-yttrium and aluminum-zirconium rich master alloys was shown.
This research has been carried out in accordance with the governmental assignment, as well as the research plan by the Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences.

keywords Scandium, yttrium, zirconium, master alloy, production technology, concentration, centrifugation, filtration

1. Yatsenko S. P., Pasechnik L. A., Skachkov V. M. Scandium: Production and application. Novosti materialovedeniya. Nauka i tekhnika. 2015. No. 3. pp. 32–37.
2. Jun-Qi He, You Wang, Mu-Fu Yan, Yong Yang, Liang Wang. First-principles study of NiAl microalloyed with Sc, Y, La and Nd. Computational Materials Science Volume. 2010. Vol. 50, Iss. 2. pp. 545–549.
3. Platonov Yu. M., Ivanov L. I., Zabolotnyi V. T., Lazorenko V. M. et al. Changes of structure, phase composition and properties of aluminum-base alloys during electron and neutron irradiation. Tsvetnye Metally. 2011. No. 10. pp. 82–88.
4. Azhazha V. M., Borts B. V., Vanzha A. F. et al. Applicability of rare earth elements when building structural elements for nuclear industry. Voprosy atomnoy nauki i tekhniki. Seriya 17. 2008. No. 1. pp. 195–201.
5. Skachkov V. M., Varchenya P. A., Ovsyannikov B. V., Yatsenko S. P. Injection of scandium-containing process powders nto aluminum alloys. Tsvetnye Metally. 2013. No. 12. pp. 81–86.
6. GOST 5632–2014. Stainless steels and corrosion resisting, heat-resisting and creep resisting alloys. Grades. Introduced: 01.01.2015.
7. GOST R 52802–2007. Pelletized nickel-base superalloys. Grades. Introduced: 30.06.2008.
8. Suzdaltsev A. V., Nikolaev A. Yu., Zaikov Yu. P. Modern ways for obtaining Al – Sc master alloys: A review. Tsvetnye Metally. 2018. No. 1. pp. 69–73. DOI: 10.17580/tsm.2018.01.09.
9. Ri E. Kh., Ri Khosen, Deev V. B., Goncharov A. V. Technology of obtainment of ligature alloys with rare-earth metal aluminides. Tsvetnye Metally. 2018. No. 4. pp. 61–66. DOI: 10.17580/tsm.2018.04.08.
10. Kozlovskiy G. A., Makhov S. V., Moskvitin V. I., Popov D. A. Technical and economic efficiency of production of aluminum master alloys contai ning Ti, Zr and B from different raw materials. Tsvetnye Metally. 2017. No. 3. pp. 53–56. DOI: 10.17580/tsm.2017.03.08.
11. Pershin P. S., Kataev A. A., Filatov A. A., Suzdaltsev A. V. et al. Synthesis of Al – Zr alloys via ZrO aluminium-thermal reduction in KF – AlFe3-bazet melts. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science. 2017. Vol. 48, No. 4. pp. 1962–1969.
12. Kosov Ya. I., Bazhin V. Yu. Synthesis of an aluminum–erbium master alloy from chloride–fluoride melts. Rasplavy. 2018. No. 1. pp. 14–28.
13. Skachkov V. M., Pasechnik L. A., Yatsenko S. P. Introduction of scandium, zirconium and hafnium into aluminum alloys. Dispersion hardening of intermetal-lic compounds with nanodimensional particles. Nanosystems: Physics, Chemistry, Mathematics. 2014. Vol. 5, No. 4. P. 603–612.
14. Mondolfo L. F. Aluminium Alloys: Structure and Properties. Moscow : Metallurgiya, 1979. 640 p.
15. Ri Kh., Ri E. Kh., Goncharov A. V., Ermakov M. A., Nikitin V. I. et al. Analysing the components of master alloys applied for aluminium alloys. Heredity in steel casting processes : Proceedings of the 8th Russian National Science and Technology Conference with International Participants. Samara, 2018. pp. 530–536.
16. Makhov S. V., Moskvitin V. I. Modern technology of production of aluminum-scandium ligature. Tsvetnye Metally. 2010. No. 5. pp. 95–97.
17. Yatsenko S. P., Skachkov V. M., Pasechnik L. A. Analysis of inclusions in aluminium alloys. Tekhnologiya metallov. 2013. No. 10. pp. 17–23.
18. Zelikman A. N., Voldman G. M., Belyavskaya L. V. Theory of hydrometallurgical processes. Moscow : Metallurgiya, 1975. 504 p.
19. Drits M. E., Kadaner E. S., Shoa N. D. Structure and Properties of Aluminum-Rich Al – Y Alloys. Izvestiya Akademii Nauk SSSR. Metally. 1969. No. 6. pp. 150–153.
20. Kasatkin A. G. Chemical technology: Key processes and equipment. Moscow : Khimiya, 1973. 752 p.
21. Liu X., Liu Y., Yan D., Han Q., Wang X. Aluminum alloys with tailored TiB2 particles for composite applications. TMS 2017, Annual Meeting and Exhibition. 2017. San Diego. pp. 181–186.
22. Wang E., Liu S., Nie J., Wang T., Liu X. A new kind of Al – 5Ti – 0.3C master alloy and its rening performance on 6063 alloy. TMS 2015, Annual Meeting and Exhibition. Orlando. 2015. pp. 961–964.
23. Skachkov V. M., Pasechnik L. A., Yatsenko S. P. Method of obtaining ligatures based on aluminum. Patent RF, No. 2680330. Published: 19.02.2019.
24. U.S. Geological Survey, 2020, Mineral commodity summaries 2020: U.S. Geological Survey, 200 p., DOI: 10.3133/mcs2020.
25. Yatsenko S. P., Skachkov V. M., Pasechnik L. А., Ovsyannikov B. V. Cycle of production of aluminum-scandium alloys and alloys. Tsvetnye Metally. 2020. No. 3. P. 68–73. DOI: 10.17580/tsm.2020.03.10

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