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The diffusivity and solubility of fluorine in solid nickel from electrochemical measurements

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Abstract

The diffusivity and solubility of fluorine in solid nickel were determined using the following solid-state electrochemical cells: Co + CoF2| BaF2| Ni | BaF2| Co + CoF2 Co + CoF2| CaF2| BaF2| Ni | BaF2| CaF2| Co + CoF2 In the temperature range 1023 to 1223 K, the diffusion coefficient of fluorine in solid nickel is given by:

$$D_F (cm^2 /s) = (2.13_{ - 1.54}^{ + 5.54} ) \times 10^{ - 3} \exp (( - 118,600 \pm 12,000J/mol)/RT)$$
(1)

The dissolution of atomic fluorine in solid nickel obeys Sieverts’ law; however, the solubility results showed considerable scatter. In the temperature range 1073 to 1223 K, the mean solubility of fluorine in solid nickel, corresponding to the equilibrium Ni + NiF2, follows the relationship: N S-F (at. pct) = 5.73 x 10-3 exp((10,850 J/mol)/RT)

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Authors and Affiliations

  1. Amoco Research Center, 60540, Naperville, IL

    S. N. S. Redday (Research Engineer)

  2. Department of Metallurgical Engineering, The Ohio State University, 43210, Columbus, OH

    Robert A. Rapp

Authors
  1. S. N. S. Redday
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  2. Robert A. Rapp
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formerly with The Ohio St te University

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Redday, S.N.S., Rapp, R.A. The diffusivity and solubility of fluorine in solid nickel from electrochemical measurements. Metall Trans B 11, 99–106 (1980). https://doi.org/10.1007/BF02657178

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  • DOI: https://doi.org/10.1007/BF02657178

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