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Thermodynamic Description of Ternary Fe-X-P Systems. Part 3: Fe-Mn-P

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Abstract

Thermodynamic descriptions of the Fe-Mn-P system and its binary sub-system, Mn-P, are developed in the frame of a new Fe-X-P (X = Al, Cr, Cu, Mn, Mo, Nb, Ni, Si, Ti) database. The thermodynamic parameters of the binary sub-systems, Fe-Mn and Fe-P, are taken from the latest earlier assessments. Those of the Fe-Mn-P and Mn-P systems are optimized in this study using literature experimental thermodynamic and phase equilibrium data. The solution phases of the system are described with the substitutional solution model and the phosphides are treated as stoichiometric phases or semi-stoichiometric phases of the (A,B) p C q type described with the two-sublattice model. The formation of a miscibility gap in the liquid phase, at high P-contents is predicted.

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Acknowledgment

Financial support of the Finnish Funding Agency for Technology and Innovation (TEKES) is gratefully acknowledged by Dr J. Miettinen. The research was carried out as part of the Finnish Metals and Engineering Competence Cluster (FIMECC)’s SIMP program.

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Authors and Affiliations

  1. School of Chemical Technology, Aalto University, Espoo, Finland

    Jyrki Miettinen

  2. Faculty of Chemistry, University of Plovdiv, 24 Tsar Asen str., 4000, Plovdiv, Bulgaria

    Gueorgui Vassilev

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  1. Jyrki Miettinen
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  2. Gueorgui Vassilev
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Correspondence to Gueorgui Vassilev.

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Miettinen, J., Vassilev, G. Thermodynamic Description of Ternary Fe-X-P Systems. Part 3: Fe-Mn-P. J. Phase Equilib. Diffus. 35, 587–594 (2014). https://doi.org/10.1007/s11669-014-0328-4

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  • DOI: https://doi.org/10.1007/s11669-014-0328-4

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