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

Willem Dutoit Malan; Guven Akdogan; Pekka Taskinen; Joseph Hamuyuni; Johan Zietsman

doi:10.1016/j.calphad.2018.10.006

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

Willem Dutoit Malan^*, Guven Akdogan, Pekka Taskinen, Joseph Hamuyuni, Johan Zietsman

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

The Ti-V-O system was studied experimentally from 700 °C to 1500 °C by high-temperature equilibration, quenching, scanning electron microscope and Energy-Dispersive X-Ray spectroscopy. The solubility of titanium in the slag is less than 3 mol% at 1500 °C and the vanadium solubility in the rutile phase reached a maximum of 7.8 mol% at 1400 °C. The thermodynamic evaluation was performed with FactSage 7.0. The solubility of vanadium in the rutile phase was developed within the framework of the compound energy formalism. The properties of the liquid phase were described with the quasichemical model. A set of self-consistent thermodynamic parameters was estimated well within acceptable limits. The calculated phase diagram of the Ti-V-O system in air is presented and compared to experimental observations and other phase diagram data from literature.

Original language	English
Pages (from-to)	220-228
Number of pages	9
Journal	Calphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume	63
DOIs	https://doi.org/10.1016/j.calphad.2018.10.006
Publication status	Published - 1 Dec 2018
MoE publication type	A1 Journal article-refereed

Keywords

Phase diagram
Static experiments
Thermodynamics
Ti-V-O system

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10.1016/j.calphad.2018.10.006

CHEM-Malan-Phase equilibria_Ti_2018_CalphadAccepted author manuscript, 849 KBLicence: CC BY-NC-ND

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title = "Phase equilibria and thermodynamic evaluation of the Ti-V-O system in air",

abstract = "The Ti-V-O system was studied experimentally from 700 °C to 1500 °C by high-temperature equilibration, quenching, scanning electron microscope and Energy-Dispersive X-Ray spectroscopy. The solubility of titanium in the slag is less than 3 mol% at 1500 °C and the vanadium solubility in the rutile phase reached a maximum of 7.8 mol% at 1400 °C. The thermodynamic evaluation was performed with FactSage 7.0. The solubility of vanadium in the rutile phase was developed within the framework of the compound energy formalism. The properties of the liquid phase were described with the quasichemical model. A set of self-consistent thermodynamic parameters was estimated well within acceptable limits. The calculated phase diagram of the Ti-V-O system in air is presented and compared to experimental observations and other phase diagram data from literature.",

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author = "Malan, {Willem Dutoit} and Guven Akdogan and Pekka Taskinen and Joseph Hamuyuni and Johan Zietsman",

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T1 - Phase equilibria and thermodynamic evaluation of the Ti-V-O system in air

AU - Malan, Willem Dutoit

AU - Akdogan, Guven

AU - Taskinen, Pekka

AU - Hamuyuni, Joseph

AU - Zietsman, Johan

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The Ti-V-O system was studied experimentally from 700 °C to 1500 °C by high-temperature equilibration, quenching, scanning electron microscope and Energy-Dispersive X-Ray spectroscopy. The solubility of titanium in the slag is less than 3 mol% at 1500 °C and the vanadium solubility in the rutile phase reached a maximum of 7.8 mol% at 1400 °C. The thermodynamic evaluation was performed with FactSage 7.0. The solubility of vanadium in the rutile phase was developed within the framework of the compound energy formalism. The properties of the liquid phase were described with the quasichemical model. A set of self-consistent thermodynamic parameters was estimated well within acceptable limits. The calculated phase diagram of the Ti-V-O system in air is presented and compared to experimental observations and other phase diagram data from literature.

AB - The Ti-V-O system was studied experimentally from 700 °C to 1500 °C by high-temperature equilibration, quenching, scanning electron microscope and Energy-Dispersive X-Ray spectroscopy. The solubility of titanium in the slag is less than 3 mol% at 1500 °C and the vanadium solubility in the rutile phase reached a maximum of 7.8 mol% at 1400 °C. The thermodynamic evaluation was performed with FactSage 7.0. The solubility of vanadium in the rutile phase was developed within the framework of the compound energy formalism. The properties of the liquid phase were described with the quasichemical model. A set of self-consistent thermodynamic parameters was estimated well within acceptable limits. The calculated phase diagram of the Ti-V-O system in air is presented and compared to experimental observations and other phase diagram data from literature.

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KW - Static experiments

KW - Thermodynamics

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

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

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