Authors: I.N. Ganiev, Q.H. Ashurov, Sh.Sh. Okilov, N.I. Ganieva

Title of the article: Kinetics of oxidation of calcium-doped aluminum conductor alloy AlV0.1 in the solid state

Year: 2026, Issue: 4, Pages: 107-117

Branch of knowledge: 2.6.1 Metal science and heat treatment of metals and alloys

Index UDK: 669.45.018.8.24/884

DOI: 10.26730/1999-4125-2026-4-107-117

Abstract: The oxidation of aluminum conductor AlV0.1 with calcium plays a dual role in technology: on the one hand, it provides natural protection for the metal by forming a strong oxide film, but on the other hand, it can reduce the performance of products when the film is destroyed in aggressive environments. The paper presents the results of a study of the oxidation kinetics of the aluminum conductor alloy AlV0.1, doped with calcium, performed by the thermogravimetric method. It was found that the introduction of calcium in an amount of 0.01 to 1.0 wt. % leads to an increase in the oxidation rate of the initial alloy AlV0.1, accompanied by a decrease in the apparent activation energy of the process. It has been shown that the oxidation process of alloys in the studied temperature interval of 723, 773, and 823K follows the hyperbolic dependence y = kxn, where n = 1 – 4. The analysis of quadratic oxidation kinetic curves, constructed in the form of dependencies of specific weight gain of alloys on time, allowed to reveal the hyperbolic mechanism of the oxidation process. By the method of X-ray phase analysis, the phase composition of oxidation products of the aluminium conductor alloy AlV0.1, doped with calcium, was determined, and their role in the oxidation mechanism was established. The results of X-ray diffraction showed that the following oxide compounds are formed during oxidation of the AlV0.1 alloy containing calcium: Al2O3; Al2O; VO532; VO2, CaO; VO2. It has been established that additives of up to 1.0 wt. % of calcium as structure modifiers significantly refine the microstructure of the initial AlV0.1 alloy, making it uniform and fine-grained. As a result of the conducted research, it has been established that the structure of the studied alloys is of the same type and consists of an aluminum solid solution and other phases. According to the state diagram of the Al-V system, the alloy structure consists of the following phase components: primary Al10V crystals on the background of an aluminum solid solution phase, an eutectic (or partially peritectic) mixture of AlV0.1 crystals with α(Al).

Key words: aluminum conductor AlV01 calcium thermogravimetric method oxidation kinetics true oxidation rate apparent activation energy and microstructure

Receiving date: 28.03.2026

Approval date: 01.09.2026

Publication date: 10.09.2026

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