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High-temperature thermodynamic stability of ditantalum carbide (Ta2C)

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Abstract

The CO(g) pressure in equilibrium with a Ta2C-Ta2O5-Ta mixture has been measured at temperatures between 1740 and 1900 K using the torsion-effusion technique. From the equilibrium data, the following equation for ΔG°2 of Ta2C has been obtained: ΔG°2 (±300) = −47,000 (±2200) +.IT From the enthalpy term in the ΔG°f equation, a value of —47.9 (±2.3) kcal/mole has been calculated for ΔH°298 of Ta2C which is in good agreement with several calorimetric results.

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Authors and Affiliations

  1. Lamp Divisions Westinghouse Electric Corp., 07003, Bloomfield, N. J.

    A. D. Kulkarni (Senior Research Engineer)

  2. School of Metallurgy and Materials Science, University of Pennsylvania, 10104, Philadelphia, Pa.

    W. L. Worrell (Associate Professor)

Authors
  1. A. D. Kulkarni
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  2. W. L. Worrell
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Additional information

This paper is based upon a thesis submitted by A. D. KULKARNI in partial fulfillment of the requirements of the degree of Doctor of Philosophy at the University of Pennsylvania.

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Kulkarni, A.D., Worrell, W.L. High-temperature thermodynamic stability of ditantalum carbide (Ta2C). Metall Trans 4, 931–933 (1973). https://doi.org/10.1007/BF02645592

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  • DOI: https://doi.org/10.1007/BF02645592

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