Phase equilibria and thermodynamic evaluation of the Fe-V-O system in air

Research output: Contribution to journalArticle


Research units

  • University of Pretoria
  • University of Stellenbosch


The Fe-V-O system in air was studied experimentally ranging from 700 °C to 1450 °C by high-temperature equilibration, quenching, scanning electron microscope and microprobe analysis. The thermodynamic evaluation was performed with FactSage 7.0. The solubility of V2O5(s) in Fe2O3(s) was described with the compound energy formalism. The properties of the liquid phase were described with both the quasichemical model and the associate species model. A set of self-consistent thermodynamic parameters were estimated within acceptable error limits. The calculated phase diagram of Fe-V-O in air is presented and compared to experimental observations and other literature data.


Original languageEnglish
Pages (from-to)12-23
Number of pages12
JournalCalphad: Computer Coupling of Phase Diagrams and Thermochemistry
Publication statusPublished - 1 Dec 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • Fe-V-O system, Phase diagram, Static experiments, Thermodynamics

ID: 32040593