Synthesis and Properties of Aluminum Alloys with Group V Transition Metals

Al–Ta, Al–Nb, and Al–V alloys are prepared by high-temperature exchange reactions between the corresponding oxides and liquid aluminum, which occur in the melts containing alkali metal chlorides and fluorides. The thermodynamic characteristics (enthalpy, entropy, Gibbs energy) of these reactions at...

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Bibliographic Details
Published in:Russian metallurgy Metally 2022-08, Vol.2022 (8), p.825-829
Main Authors: Skachkov, V. M., Pasechnik, L. A., Bibanaeva, S. A., Medyankina, I. S., Surikov, V. T., Sabirzyanov, N. A.
Format: Article
Language:English
Subjects:
Alloying
Aluminum base alloys
Chemistry and Materials Science
Corrosion resistance
Enthalpy
High temperature
Intermetallic compounds
Materials Science
Metal chlorides
Metallic Materials
Metallurgy
Microhardness
Niobium
Phase diagrams
Tantalum
Transition metals
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Summary:Al–Ta, Al–Nb, and Al–V alloys are prepared by high-temperature exchange reactions between the corresponding oxides and liquid aluminum, which occur in the melts containing alkali metal chlorides and fluorides. The thermodynamic characteristics (enthalpy, entropy, Gibbs energy) of these reactions at 800°C are calculated. The possibility of alloying of aluminum with small additions of Ta, Nb, and V using high-temperature exchange reactions is shown; the direct metallurgical yield is found to decrease when the metal concentrations in a final alloy increase. The intermetallic compounds (Al 3 Ta, Al 3 Nb, and Al 3 V) formed in an alloy are identified by X-ray diffraction analysis and correspond to phase diagrams. The microstructure of the prepared alloys is studied, and their corrosion resistance and microhardness are determined.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S003602952208016X