Abstract
The metallothermic (calcium hydride) synthesis of Ti–Nb alloy powders alloyed with tantalum and zirconium is experimentally studied under various conditions. Chemical, X-ray diffraction, and metallographic analyses of the synthesized products show that initial oxides are completely reduced and a homogeneous β-Ti-based alloy powder forms under the optimum synthesis conditions at a temperature of 1200°C. At a lower synthesis temperature, the end products have a high oxygen content. The experimental results are used to plot the thermokinetic dependences o formation of a bcc solid solution at various times of isothermal holding of Ti–22Nb–6Ta and Ti–22Nb–6Zr (at %) alloys. The physicochemical and technological properties of the Ti–22Nb–6Ta and Ti–22Nb–6Zr alloy powders synthesized by calcium hydride reduction under the optimum conditions are determined.
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Original Russian Text © A.V. Kasimtsev, A.V. Shuitsev, S.N. Yudin, Yu.V. Levinskii, T.A. Sviridova, A.V. Alpatov, E.E. Novosvetlova, 2017, published in Metally, 2017, No. 5, pp. 52–63.
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Kasimtsev, A.V., Shuitsev, A.V., Yudin, S.N. et al. Calcium hydride synthesis of Ti–Nb-based alloy powders. Russ. Metall. 2017, 724–734 (2017). https://doi.org/10.1134/S0036029517090075
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DOI: https://doi.org/10.1134/S0036029517090075