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The Influence of Production Technology on the Structure and Mechanical Properties of Niobium–Silicon–Aluminum Alloys

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Abstract

Cast Nb–14 at % Si–9 at % Al alloys fabricated by self-propagating high-temperature synthesis (SHS) and by SHS followed by electric arc remelting have been investigated. A structure consisting of a solid solution of silicon and aluminum in niobium (NbSS), a Nb3Al intermetallic compound, and a β-Nb5(Si,Al)3 silicide formed in the alloy fabricated by SHS. Electric arc remelting suppressed the formation of the Nb3Al phase and resulted in the formation of a dispersed two-phase NbSS and β-Nb5(Si, Al)3 structure in the alloy. The increased volume fraction of NbSS and the dispersed structure formed after electric arc remelting in the alloy increase its fracture toughness to 14.8 ± 0.8 MPa m1/2 compared to 7.7 ± 0.8 MPa m1/2 for the SHS-prepared alloy.

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Funding

The study was carried out according to the subject of scientific research no. 121030100001-3 using equipment at “The Center for Physical and Physical-Chemical Methods of Analysis, Investigation of the Properties and Characteristics of a Surface, Nanostructures, Materials, and Products” of the Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences (the project unique identifier RFMEFI62119X0035).

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Authors and Affiliations

  1. Udmurt Federal Research Centre of the Ural Branch of the Russian Academy of Sciences, 426067, Izhevsk, Russia

    I. V. Sapegina, A. N. Lubnin & V. I. Ladyanov

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  1. I. V. Sapegina
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  2. A. N. Lubnin
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  3. V. I. Ladyanov
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Correspondence to I. V. Sapegina.

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Translated by T. Gapontseva

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Sapegina, I.V., Lubnin, A.N. & Ladyanov, V.I. The Influence of Production Technology on the Structure and Mechanical Properties of Niobium–Silicon–Aluminum Alloys. Phys. Metals Metallogr. 124, 303–307 (2023). https://doi.org/10.1134/S0031918X22602050

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