Oxidation of Aluminum Melts with Rare-Earth Metals

Ганиев, И. Н.; Ганиева, Н. И.; Eshova, D. B.

doi:10.1134/s0036029518050063

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…The oxidation of E-AlMgSi alloys (Aldrey) was studied using a thermal gravimetric method based on continuous weighing of specimens. The experiments were conducted on the custom-assembled test system the operation principle of which was described earlier [6][7][8][9][10][11][12]. The crucible with the test metal was placed into the isothermal zone of the furnace.…”

Section: Methodsmentioning

confidence: 99%

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Corrosion of indium doped E-AlMgSi aluminum conductor alloy (Aldrey)

Ганиев¹,

Aliev²,

Odinazoda³

et al. 2021

MoEM

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The effect of impurities on the electrical conductivity of aluminum has been studied in detail. The electrical conductivity of aluminum is 65.45% of that of copper. The tensile strength of aluminum wire is 150–170 MPa which, at equal conductivity, is about 65% of the strength of copper wire. This strength of aluminum wire is sufficient for bearing the wire’s own weight but may be too low in case of snow, ice or wind overloads. One way to improve the strength of aluminum wire is to use aluminum alloys having higher strength combined with sufficiently high electrical conductivity, e.g. the E-AlMgSi alloy (Aldrey). The key strengthening agent of the E-AlMgSi alloy (Aldrey) is the Mg2Si phase which imparts high mechanical strength to aluminum. In this work we present experimental data on the kinetics of high-temperature oxidation and electrochemical corrosion of indium doped E-AlMgSi aluminum conductor alloy (Aldrey). Thermal gravimetric study has shown that indium doping and high temperature exposure increase the oxidation rate of E-AlMgSi alloy (Aldrey), with the apparent alloy oxidation activation energy decreasing from 120.5 to 91.8 kJ/mole. Alloy oxidation rate data determined using a potentiostatic technique in NaCl electrolyte media have shown that the corrosion resistance of the indium doped alloy is 20–30% superior to that of the initial alloy. With an increase in NaCl electrolyte concentration the electrochemical potentials of the alloys decrease whereas the corrosion rate increases regardless of alloy composition.

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Section: Methodsmentioning

confidence: 99%

“…The temperature measurement accuracy was ±2 K. The temperature measurement error was = 0.22 %. This method of alloy oxidation kinetics study was described elsewhere [6][7][8][9][10][11][12].…”

Section: Methodsmentioning

confidence: 99%

Corrosion of indium doped E-AlMgSi aluminum conductor alloy (Aldrey)

Ганиев¹,

Aliev²,

Odinazoda³

et al. 2021

MoEM

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“…The reverse process produced exactly the same outcome. From the Li-Sc binary diagram constructed based on a schematic phase diagram for Li-rare earth systems [29], 2% Li would react with Sc at a temperature as high as 1500 • C. While the addition of Li did not play a significant role in altering the microhardness under most heat treatment conditions, it became more notable when aiming for the highest microhardness achieved by aging at 120 • C for 24 h. In this condition, the microhardness reached 198 VHN, nearly 13 units higher than that of the Al 7075-Sc alloy sample alone. This finding suggests that lithium is highly effective in the formation of small and uniformly dispersed precipitates, contributing to the enhanced microhardness of the Al 7075-Sc-Li alloy.…”

Section: Effect Of the Heat Treatments On Microhardness Of Al 7075-li...mentioning

confidence: 99%

Effect of Aging Treatment on the Strength and Microstructure of 7075-Based Alloys Containing 2% Li and/or 0.12% Sc

Tahmasbi,

Samuel,

Zedan

et al. 2023

Materials

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The present study was performed on three versions of 7075 alloy to which Sc or Sc + Li was added. The alloys were subjected to various aging treatments. The microhardness results show that the highest value of hardness was achieved when the alloy containing Li + Sc was aged at 120 °C for 24 h whereas the minimum level was exhibited by the base alloy aged at 280 °C. The results were interpreted in terms of the size and distribution of the main hardening phase (η′(MgZn2)), and the role of the presence of Al and Cu in the used alloy. Precipitation of Al3(Sc, Zr, Ti) phase particles during solidification of the Sc-containing ingots was also discussed. The coarsening and spheroidi-zation of η-phase particles take place through the Ostwald ripening mechanism while smaller par-ticles in solution dissolve and deposit on larger particles. In Sc-containing alloys, star phase particle consists of different layers. The change in the brightness from layer to layer indicates that the Zr and Sc concentrations are varied within the star phase, since the atomic number of Zr (40) is higher than the atomic number of Sc (21). The addition of Sc, as well, leads to marked decrease in the grain size of the as-cast alloys i.e., 300 µm and 45 µm, respectively. The interaction between Li and Sc would reduce the effectiveness of the grain refining effect of Sc. The results of the refining effect of Sc were confirmed using the EBSD technique.

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Kinetics of Oxidation of Ba–Ge-Based Melts by Atmospheric Oxygen

Olimov

Ганиев

2022

Russ. Metall.

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Oxidation of Aluminum Melts with Rare-Earth Metals

Cited by 6 publications

References 4 publications

Corrosion of indium doped E-AlMgSi aluminum conductor alloy (Aldrey)

Corrosion of indium doped E-AlMgSi aluminum conductor alloy (Aldrey)

Effect of Aging Treatment on the Strength and Microstructure of 7075-Based Alloys Containing 2% Li and/or 0.12% Sc

Kinetics of Oxidation of Ba–Ge-Based Melts by Atmospheric Oxygen

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