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Effects of nonstoichiometry and ordering on the basic lattice constant of vanadium carbide VC y

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Abstract

The effect of nonstoichiometry and ordering on the lattice constant a B1 of the basic lattice of vanadium carbide VC y (0.65 < y < 0.875) is studied. A change in the lattice constant of disordered carbide VC y at the reduction of the carbon content is considered using the direction of static displacements of atoms near a vacancy. A model for the calculation of the basic lattice constant a B1 of vanadium carbide is proposed taking into account nonstoichiometry and ordering. It is shown that the ordering of vanadium carbide VC y with the formation of V6C5 and V8C7 superstructures results in an increase in the basic lattice constant as compared to disordered carbide.

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Authors and Affiliations

  1. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990, Russia

    A. S. Kurlov & A. I. Gusev

Authors
  1. A. S. Kurlov
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  2. A. I. Gusev
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Correspondence to A. I. Gusev.

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Original Russian Text © A.S. Kurlov, A.I. Gusev, 2017, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2017, Vol. 105, No. 6, pp. 340–346.

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Kurlov, A.S., Gusev, A.I. Effects of nonstoichiometry and ordering on the basic lattice constant of vanadium carbide VC y . Jetp Lett. 105, 357–363 (2017). https://doi.org/10.1134/S002136401706008X

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