Abstract—
We describe a sequence of structural transformations characterizing high-temperature nitridation of zirconium–niobium alloys containing 0.1–10 wt % niobium. High-temperature saturation of solid solutions of niobium in zirconium with nitrogen is accompanied by decomposition of the Zr〈Nb〉 solid solution and the formation of Zr1 – хNbхN–(ZrN1 – n/β-solid solution of Zr in Nb)–Zr1 – хNbхN composite structures. During nitridation of the heterostructures, zirconium nitride reacts with β-niobium, which is the final step of the nitridation of the parent Zr〈Nb〉 solid solution. Characteristically, the ceramics thus prepared have near-surface porosity reproducing the surface porosity of the as-rolled material.
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This work was supported by the Russian Science Foundation, project no. 20-13-00392 (federal state budget funded science institution Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences).
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Kovalev, I.A., Shevtsov, S.V., Kochanov, G.P. et al. Structural Transformations of Ceramics Forming during High-Temperature Nitridation of Zr–Nb Alloys. Inorg Mater 58, 531–537 (2022). https://doi.org/10.1134/S0020168522050065
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DOI: https://doi.org/10.1134/S0020168522050065