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Study of viscosity of Fe-Cr melts containing 2 to 40 at % of chromium

  • Thermophysical Properties of Materials
  • Published:
High Temperature Aims and scope

Abstract

The temperature, time, and concentration dependences of viscosity ν of Fe-Cr melts containing 2 to 40 at % of chromium are studied. It is shown that the observed anomalies in viscosity polytherms in the first heating mode and the hysteresis of ν in subsequent cooling are due to the slow setting of thermodynamic and chemical equilibrium in the system of crucible-melt-atmosphere, which is shifted to higher temperatures with increasing oxygen content in the alloy. The minimum and maximum of viscosity are observed at 5 and 12 at % of Cr, respectively; they are caused by a concentration change in the binding energy between the atoms, which is determined by the geometric and compositional short-range order. The nonequilibrium state of the melts has no significant effect on the nature of their viscosity isotherms.

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Authors and Affiliations

  1. Physical-Technical Institute, Ural Branch, Russian Academy of Sciences, Izhevsk, 426000, Russia

    I. V. Sterkhova, L. V. Kamaeva & V. I. Lad’yanov

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  1. I. V. Sterkhova
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  2. L. V. Kamaeva
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  3. V. I. Lad’yanov
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Correspondence to I. V. Sterkhova.

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Original Russian Text © I.V. Sterkhova, L.V. Kamaeva, V.I. Lad’yanov, 2014, published in Teplofizika Vysokikh Temperatur, 2014, Vol. 52, No. 6, pp. 836–842.

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Sterkhova, I.V., Kamaeva, L.V. & Lad’yanov, V.I. Study of viscosity of Fe-Cr melts containing 2 to 40 at % of chromium. High Temp 52, 814–820 (2014). https://doi.org/10.1134/S0018151X14040221

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  • DOI: https://doi.org/10.1134/S0018151X14040221

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