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Nitridation kinetics of niobium in the temperature range of 873 to 1273 K

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Abstract

The kinetics of Nb (Cb) nitridation and ε-NbN growth obey a parabolic relationship and their temperature dependence can be expressed ask p = 5.19 × 10−7 exp (−125,500/RT) and (k p ξ = 1.15 × 10−4 exp (−61,500/RT), respectively, with the activation energies in joules/mole. The nitrogen diffusion coefficient in niobium, obtained from microhardness traverses, is given byD = 1.02 × 10−5 exp (−77,000/RT). A diffusion model accounting for the partition of nitrogen between ε-NbN and Nb is proposed. The total nitrogen uptake calculated from the model is compared to that obtained experimentally.

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Authors and Affiliations

  1. University of Cincinnati, 45221, Cincinnati, OH

    James T. Clenny (Consulting Engineer) & Casimir J. Rosa (Professor of Metallurgical Engineering)

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  1. James T. Clenny
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  2. Casimir J. Rosa
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Clenny, J.T., Rosa, C.J. Nitridation kinetics of niobium in the temperature range of 873 to 1273 K. Metall Trans A 11, 1575–1580 (1980). https://doi.org/10.1007/BF02654521

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