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High temperature thermodynamic properties of the tungsten carbide WC determined using a galvanic cell technique

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Abstract

The standard free energy of formation of WC has been obtained from emf measurements on the following galvanic cells with BaF2-BaC2 solid solutions as the electrolyte: Cr,Cr23C6 | BaF2-BaC2 | W,WC (878 to 1132 K) (A) and Mo,Mo2C | BaF2-BaC2 | W,WC (889 to 1309 K) (B) Combining the results of this study with a previous work16 and those of Kulkarniet al.,17 the following equations for ΔG°f of WC have been determined: from cell (A): ΔG°f (±950) = -38,000 (±328) -6.6 (±0.3)T joules. From cell (B): ΔG°f (±1000) = -37,866 (±212) - 6.5 (±0.2)T joules for the reaction W + C = WC.

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Authors and Affiliations

  1. Department of Materials Science, Universidad Simon Bolivar, Caracas, Venezuela

    R. G. Coltters (Professor)

  2. Central Research Laboratories, The Broken Hill Proprietary Company, Limited, Australia

    G. R. Belton (Director)

Authors
  1. R. G. Coltters
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  2. G. R. Belton
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Coltters, R.G., Belton, G.R. High temperature thermodynamic properties of the tungsten carbide WC determined using a galvanic cell technique. Metall Trans A 14, 1915–1919 (1983). https://doi.org/10.1007/BF02645563

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