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RARE METALS, SEMICONDUCTORS
ArticleName Modern ways for obtaining Al – Sc master alloys: A review
DOI 10.17580/tsm.2018.01.09
ArticleAuthor Suzdaltsev A. V., Nikolaev A. Yu., Zaikov Yu. P.
ArticleAuthorData

Institute of High-Temperature Electrochemistry (Ural Branch RAS), Ekaterinburg, Russia:
A. V. Suzdaltsev, Senior Researcher of Electrolysis Department, e-mail: suzdaltsev_av@mail.ru

Yu. P. Zaikov, Researcher of Electrolysis Department

 

Ural Federal University, Ekaterinburg, Russia:

A. Yu. Nikolaev, Senior Lecturer

Abstract

Recent years showed the increased urgency of developing new resource- and energy-saving methods for obtaining alloys, master alloys and composite materials based on aluminum and other metals. In particular, our article is a brief review of the main scientific and technological features of modern methods for obtaining Al – Sc master alloys. The main producers of Al – Sc master alloys in Russia and abroad are listed. Our scientific and technical information defined three main ways for producing Al – Sc master alloys:
– direct alloying of scandium with aluminum;
– aluminothermic synthesis using scandium salts or oxide as a scandium source;
– electrowinning from molten salts using scandium salts or oxide as a scandium source.
The essence of listed methods is briefly described in this article. The views of different authors on the mechanisms are given (in particular, the aluminothermic reduction of scandium salts). Advantages and disadvantages were analyzed and gave a comparative evaluation of parameters of the most promising methods for further development. As parameters, data on the process temperature, scandium content in obtained master alloys was analyzed together with the degree of scandium extraction from its sources. In conclusion, we describe the results of recent studies of Institute of High-Temperature Electrochemistry for developing an energy-effective and resourcesaving method for the continuous production of Al – Sc master alloys by electrolysis of oxide-fluoride melts with scandium oxide. A high competitiveness of electrolysis of oxide-fluoride KF – NaF – AlF3 – Al2O3 – Sc2O3 melts for production of Al – Sc master alloys of 2 wt. % of scandium was shown.

keywords Aluminium, scandium, master alloy, flux, scandium oxide, oxidefluoride melt, aluminothermy, electrolysis
References

1. Royset J., Ryum N. Scandium in aluminium alloys overview: physical metallurgy, properties and applications. International Materials Reviews. 2005. Vol. 50, No. 1. pp. 19–46.
2. Zakharov V. V. Kinetics of decomposition of the solid solution of scandium in aluminum in binary Al – Sc alloys. Metallovedenie i termicheskaya obrabotka metallov. 2015. No. 7. pp. 44–48.
3. Ovsyannikov B. V., Zamyatin V. M. Behavior of scandium in aluminum alloys of different alloying systems. Materials Science Forum. 2014. Vol. 794–796. pp. 1002–1007.
4. Kotenkov P. V., Popova E. A., Pastukhov E. A., Bykov A. S. “Survivability” of Al – Sc – Zr master alloy. Tsvetnye Metally. 2013. No. 12. pp. 77–80.
5. GOST R 53777–2010. Master alloys of aluminium. Specifications. Introduced: 2010–07–01.
6. Yang Sh., Gao B., Wang Zh., Shi Zh., Ban Y., Kan H., Cao X., Qiu Zh. Preparation of Al – Sc alloys by molten salts electrolysis. Light Metals. 2007. pp. 54–57.
7. Makhov S. V., Moskvitin V. I. Basis of kinetics of aluminium-thermal reduction scandium from chloride-fluorscandiate solutions. Izvestiya vuzov. Tsvetnaya metallurgiya. 1998. No. 2. pp. 13–16.
8. Makhov S. V., Moskvitin V. I. Modern technology of obtaining of aluminium and scandium ligature. Tsvetnye Metally. 2010. No. 5. pp. 95, 96.
9. Skachkov V. M., Yatsenko S. P. Obtaining of Sc, Zr, Hf and Y base metals on the basis of aluminum by method of high-temperature exchange reactions in salt melts. Tsvetnye Metally. 2014. No. 3. pp. 22–26.
10. Skachkov V. M., Varchenya P. A., Ovsyannikov B. V., Yatsenko S. P. Injection of scandium-containing process powders into aluminum alloys. Tsvetnye Metally. 2013. No. 12. pp. 81–86.
11. Yatsenko S. P., Skachkov V. M., Yatsenko A. C. Receipt of ligature on basis of aluminium by method of high-temperature exchange reaction in molten salts. V. Injection of technological powders in liquid aluminium. Rasplavy. 2011. No. 4. pp. 41–46.
12. Turkdogan E. T. Physical chemistry of high temperature processes. Moscow : Metallurgiya, 1985. 344 p.
13. Sokolova Yu. V., Cherepanin R. N., Sagalova T. B. Possibilities of electrochemical cobalt water-solution treatment process from manganese impurity. Izvestiya vuzov. Tsvetnaya metallurgiya. 2006. No. 4. pp. 40–44.
14. Brown D. Halides of the transition elements. Halides of the lanthanides and actinides. London : Wiley, 1968. 280 p.
15. Shubin A. B., Shunyaev K. Yu. Method for obtaining aluminium-scandium alloy combination. Patent RF, No. 2507291. Published: 20.02.2014.
16. Gorokhov D. S., Poponin N. A., Kukushkin Yu. M., Kazantsev V. P., Rychkov V. N. Procedure for production of aluminium-scandium addition alloy for alloys on base of aluminium. Patent RF, No. 2426807. Published: 27.03.2011.
17. Castrillejo Y., Vega A., Vega M., Hernandez P., Rodriguez J. A., Barrado E. Electrochemical formation of Sc – Al intermetallic compounds in the eutectic LiCl – KCl. Determination of thermodynamic properties. Electrochimica Acta. 2014. Vol. 118. pp. 58–66.
18. Tian Y., Sun B., Zhai Yu. Preparation of Al – Sc alloy in chloride system with molten salt electrolysis. Transactions of Nonferrous Metals Society of China. 1998. Vol. 8. pp. 626–631.
19. Yang Sh., Gao B., Wang Zh., Shi Zh., Ban Y., Kan H., Cao X., Qiu Zh. Preparation of Al – Sc alloys by molten salts electrolysis. Innovations in Electrometallurgy (TMS Annual Meeting). 2007. pp. 54–57.
20. Harata M., Yasuda K., Yakushiji H., Okabe T. H. Electrochemical production of Al – Sc alloy in CaCl2 – Sc2O3 molten salt. Journal of Alloys and Compounds. 2009. Vol. 474. pp. 124–130.
21. Nikolaev A. Yu., Suzdaltsev A. V., Zaykov Yu. P. Electrochemical behavior of scandium and aluminum at the formation and dissolution of Al – Sc alloys and master alloys in the KF – AlF3 melt. Trudy Kolskogo nauchnogo tsentra RAN. 2015. No. 5 (31). pp. 262–266.
22. Schwellinger P. Method for the production of an aluminum-scandium master alloy. Patent WO2006079353 (А1). Publ. 03.08.2006.
23. Moskvitin V. I., Makhov S. V. About the possibility of obtaining of aluminiumscandium ligature in aluminium electrolyser. Tsvetnye Metally. 1998. No. 7. pp. 43–46.
24. Zaikov Yu., Tkacheva O., Suzdaltsev A., Kataev A., Shtefanyuk Yu., Pingin V., Vinogradov D. Lab scale synthesis of Al – Sc alloys in NaF – AlF3 – Al2O3 – Sc2O3 melt. Advanced Materials Research. 2015. Vol. 1088. pp. 213–216.
25. Qian Y., Xue J., Liu Q., Zhu J. Preparing Al – Sc – Zr alloys in aluminum electrolysis process. Light Metals. 2013. pp. 1311–1314.
26. Zaykov Yu. P., Suzdaltsev A. V., Nikolaev A. Yu., Tkacheva O. Yu., Vinogradov D. A., Pingin V. V., Shtefanyuk Yu. M., Mann V. Kh. Electrolytic method for continuous production of aluminium alloy with scandium. Patent RF, No. 2599312. Published: 10.10.2016.
27. Napalkov V. I., Makhov S. V. Alloying and modification of magnesium and aluminium. Moscow : MISiS, 2002.
28. Liu Q., Xue J., Zhu J., Qian Y., Feng L. Processing Al – Sc alloys at liquid aluminum cathode in KF – AlF3 molten salt. ECS Transactions. 2012. Vol. 50 (11). pp. 483–489.
29. Liu Q., Xue J., Zhu J., Guan Ch. Preparing aluminium-scandium inter-alloys during reduction process in KF – AlF3 – Sc2O3 melts. Light metals. 2012. pp. 685–689.
30. Tkacheva O., Redkin A., Kataev A., Rudenko A., Dedyukhin A., Zaikov Y. Novel Molten Salts Media For Production of Functional Materials. MATEC Web of Conferences. 2016. Vol. 67. DOI: 10.1051/matecconf/20166706044
31. Dedyukhin A. E., Apisarov A. P., Tkatcheva O. Yu., Zaikov Yu. P., Redkin A. A. Alumina solubility and electrical conductivity in potassium cryolites with low cryolite ratio. Molten Salts and Ionic Liquids: Never the Twain? 2012. pp. 75–84.
32. Shtefanyuk Yu., Mann V., Pingin V., Vinogradov D., Zaikov Yu., Tkacheva O., Nikolaev A., Suzdaltsev A. Production of Al – Sc alloy by electrolysis of cryolitescandium oxide melts. Light Metals. 2015. pp. 589–593.
33. Nikolaev A. Yu., Suzdaltsev A. V., Polyakov P. V., Zaikov Yu. P. Cathode process at the electrolysis of KF – AlF3 – Al2O3 melts and suspensions. Journal of the Electrochemical Society. 2017. Vol. 164 (8). pp. H5315–H5321.
34. Nikolaev A. Yu., Yasinskiy A. S., Suzdaltsev A. V., Polyakov P. V., Zaykov Yu. P. Aluminum Electrolysis in the KF – AlF3 – Al2O3 Melts and Suspensions. Rasplavy. 2017. No. 3. pp. 205–213.
35. Mann V. Kh., Pingin V. V., Vinogradov D. A., Shtefanyuk Yu. M., Zaykov Yu. P., Suzdaltsev A. V., Nikolaev A. Yu., Tkacheva O. Yu. Method for producing aluminum-scandium ligature. Pat. WO2016171584 (A1). Published: 27.10.2016.
36. Zaykov Yu. P., Suzdaltsev A. V., Nikolaev A. Yu., Tkacheva O. Yu., Vinogradov D. A., Pingin V. V., Shtefanyuk Yu. M., Mann V. Kh. Method of continuous production of aluminium ligature with 2 wt % of scandium. Patent RF, No. 2629418. Published: 29.08.2017.

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