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An enthalpy of solution of platinum in iron studied by 57Fe Mössbauer spectroscopy

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Abstract

The room temperature Mössbauer spectra of 57Fe were measured for iron-based solid solutions Fe1 − x Pt x with x in the range 0.01 ≤ x ≤ 0.05. The obtained data were analysed in terms of the binding energy E b between two platinum atoms in the studied materials using the extended Hrynkiewicz–Królas idea. It was found that for x < 0.05 the energy is positive or Pt atoms interact repulsively. The extrapolated value of E b for x = 0 was used for computation of the enthalpy H Fe − Pt of solution of platinum in iron. The result H Fe − Pt = −0.62(16) eV/atom was compared with the corresponding values resulting from the semi-empirical Miedema’s model of alloys and the proper data obtained with Calphad’s calculations as well as theoretical computations on the basis of the modified embedded-atom model. The comparison shows that all mentioned values of H Fe − Pt are in a qualitative agreement i.e. they are negative, and moreover our findings agree also quantitatively with the Miedema’s model predictions.

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Authors and Affiliations

  1. Institute of Experimental Physics, University of Wrocław, pl. M. Borna 9, 50-204, Wrocław, Poland

    Robert Konieczny, Rafał Idczak, Jakub Elsner & Jan Chojcan

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  1. Robert Konieczny
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  2. Rafał Idczak
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  3. Jakub Elsner
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  4. Jan Chojcan
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Correspondence to Robert Konieczny.

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Konieczny, R., Idczak, R., Elsner, J. et al. An enthalpy of solution of platinum in iron studied by 57Fe Mössbauer spectroscopy. Hyperfine Interact 206, 119–124 (2012). https://doi.org/10.1007/s10751-011-0480-8

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