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Structural and Phase Transformations in Alloys during Spark Plasma Sintering of Ti + 23.5 at % Al + 21 at % Nb Powder Mixtures

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Abstract

We have studied the effect of sintering temperature on the structural and phase transformations of alloys produced by the spark plasma sintering of Ti + 23.5 at % Al + 21 at % Nb powder mixtures at temperatures in the range 1100–1550°C. The sintered alloys have been characterized by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy (elemental X-ray mapping). The alloys sintered at temperatures of 1100 and 1200°C have been shown to have a nonuniform microstructure. According to electron microscopy results, the alloys consist of grains of the α2 and Nb2Al phases and small precipitates of the O-phase (intermetallic compound Ti2AlNb). In addition, there are particles of unreacted niobium and titanium. The alloys sintered at a temperature of 1300°C have a uniform lamellar structure.

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Authors and Affiliations

  1. Institute of Atomic Energy, National Nuclear Center of the Republic of Kazakhstan, Krasnoarmeiskaya ul. 10, Kurchatov, 071100, Kazakhstan

    B. K. Karakozov, M. K. Skakov, Sh. R. Kurbanbekov & V. V. Baklanov

  2. Polzunov State Technical University, pr. Lenina 46, Barnaul, 656038, Russia

    A. A. Sitnikov & V. I. Yakovlev

  3. Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 15, Novosibirsk, 630090, Russia

    D. V. Dudina & V. I. Maly

  4. Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128, Russia

    D. V. Dudina

  5. Novosibirsk State Technical University, pr. Marksa 20, Novosibirsk, 630073, Russia

    D. V. Dudina

Authors
  1. B. K. Karakozov
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  2. M. K. Skakov
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  3. Sh. R. Kurbanbekov
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  4. V. V. Baklanov
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  5. A. A. Sitnikov
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  6. D. V. Dudina
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  7. V. I. Maly
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  8. V. I. Yakovlev
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Corresponding author

Correspondence to Sh. R. Kurbanbekov.

Additional information

Original Russian Text © B.K. Karakozov, M.K. Skakov, Sh.R. Kurbanbekov, V.V. Baklanov, A.A. Sitnikov, D.V. Dudina, V.I. Maly, V.I. Yakovlev, 2018, published in Neorganicheskie Materialy, 2018, Vol. 54, No. 1, pp. 40–45.

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Karakozov, B.K., Skakov, M.K., Kurbanbekov, S.R. et al. Structural and Phase Transformations in Alloys during Spark Plasma Sintering of Ti + 23.5 at % Al + 21 at % Nb Powder Mixtures. Inorg Mater 54, 37–41 (2018). https://doi.org/10.1134/S0020168518010053

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  • DOI: https://doi.org/10.1134/S0020168518010053

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