Synthesis of High-Entropy Alloy AlTiZrVNb by Aluminothermic Reaction

• Published in: Russian journal of inorganic chemistry 2022-06, Vol.67 (6), p.888-891
• Main Authors: Zhilina, E. M., Russkikh, A. S., Krasikov, S. A., Osinkina, T. V., Rempel, A. A.
• Format: Article
• Language: English
• Subjects: Aluminothermic reactions; Aluminum oxide; Chemical analysis; Chemistry; Chemistry and Materials Science; Electric resistance furnaces; High entropy alloys; High temperature; Inclusions; Inorganic Chemistry; Inorganic Materials and Nanomaterials; Niobium oxides; Reduction (metal working); Scanning electron microscopy; Solid solutions; Titanium dioxide; X ray powder diffraction; Zirconium dioxide
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S0036023622060249

The possibility of using the aluminothermic method for the reduction of metals from oxides in the synthesis of high-entropy alloys is shown. The features of the aluminothermal production of a high-entropy AlTiZrVNb alloy in a resistance furnace, where the structure is formed during the interaction of oxides of transitional refractory rare metals with aluminum at high temperatures, have been experimentally studied. The resulting products have been studied by chemical analysis, X-ray powder diffraction, and scanning electron microscopy (SEM). It has been found that the interaction of Al with a mixture of TiO 2 , ZrO 2 , V 2 O 5 , and Nb 2 O 5 oxides proceeds with a very good separation of the oxide and metal phases. According to the SEM results, the microstructure of the alloy is a solid solution with Al 2 O 3 impurity inclusions.