Thermodynamic Description of Ternary Fe-X-P Systems. Part 8: Fe-Si-P

Jyrki Miettinen, Gueorgui Vassilev-Urumov*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Thermodynamic descriptions of the Fe-Si-P system is developed in the frame of a new Fe-X-P (X = Al, Cr, Cu, Mn, Mo, Si, Ni, Si, Ti) database. The thermodynamic parameters of the binary sub-systems, Fe-Si, Fe-P and Si-P, are taken from the earlier assessments and those of the Fe-Si-P system are optimized in this study using the experimental thermodynamic and phase equilibrium data of the literature. The solution phases of the system (bcc_A2, fcc_A1, dia_A4, liquid) are described with the substitutional solution model. The compounds are treated either with the sublattice model (FeSi2-H, Fe2P and FeP) either as stoichiometric phases (Fe3P, Fe2Si, Fe5Si3, FeSi, FeSi2-L, SiP, SiP2 and FeSi4P4). No solubility of Fe neither Si in the white P-phase has been modeled. The correlation between the calculated and the experimental thermodynamic and phase equilibrium data is reasonably good.

Original languageEnglish
Pages (from-to)540–547
Number of pages8
JournalJOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
Volume37
Issue number5
DOIs
Publication statusPublished - Oct 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Fe-based systems
  • Fe-Si-P system
  • Fe-X-P database
  • phase diagrams
  • thermodynamic database
  • thermodynamic modelling

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