Malan, Willem DutoitAkdogan, GuvenTaskinen, PekkaZietsman, Johannes Hendrik2019-08-162019-06Malan, W.D., Akdogan, G., Taskinen, P. et al. 2019, 'Phase equilibria and thermodynamic evaluation of the Fe-Ti-V-O system in air', Calphad, vol. 65, pp. 141-154.0364-5916 (print)1873-2984 (online)10.1016/j.calphad.2019.02.014http://hdl.handle.net/2263/71121The raw data required to reproduce these findings are available to download from [https://data.mendeley.com/submissions/evise/edit/nvpgs2vjmr?submission_id=S0364-5916(18)30217-7&token=6bc0021a-85ab-4ea8-85c1-4f774cda067e].The processed data required to reproduce these findings are available to download from [https://data.mendeley.com/submissions/evise/edit/nvpgs2vjmr?submission_id=S0364-5916(18)30217-7&token=6bc0021a-85ab-4ea8-85c1-4f774cda067e].In this study, the iron-titanium-vanadium-oxygen (Fe-Ti-V-O) system in equilibrium with air was studied experimentally by high-temperature equilibration, quenching, scanning electron microscope and microprobe analysis coupled with critical assessment and thermodynamic evaluation. The properties of the liquid phase were successfully described with the quasichemical model by optimizing parameters only related to the Fe-Ti-O system; remaining parameters for the Fe-V-O and Ti-V-O sub-systems were adopted from recent optimisations. The model for the rutile and hematite solid solutions were described with the compound energy formalism. The ferropseudobrookite solid solution was modelled with a simple polynomial model to include a small solubility . A final set of self-consistent thermodynamic parameters was estimated within acceptable error limits. Calculated isothermal projections at 1000 °C, 1100 °C, 1200 °C, 1300 °C, and 1400 °C of the Fe-Ti-V-O system in equilibrium with air are presented and compared to experimental observations.en© 2019 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Calphad. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Calphad, vol. 65, pp. 141-154, 2019. doi : 10.1016/j.calphad.2019.02.014.Fe-Ti-V-O systemThermodynamicsStatic experimentsPhase diagramEngineering, built environment and information technology articles SDG-04SDG-04: Quality educationEngineering, built environment and information technology articles SDG-07SDG-07: Affordable and clean energyEngineering, built environment and information technology articles SDG-08SDG-08: Decent work and economic growthEngineering, built environment and information technology articles SDG-09SDG-09: Industry, innovation and infrastructureEngineering, built environment and information technology articles SDG-12SDG-12: Responsible consumption and productionEngineering, built environment and information technology articles SDG-13SDG-13: Climate actionPostprint Article