University of Oulu

Miettinen, J.; Visuri, V.-V.; Fabritius, T.; Vassilev, G. (2020) Thermodynamic description of ternary Fe–B–X systems : part 7: Fe–B–C. Arch. Metall. Mater. 65(2): 923-933.

Thermodynamic description of ternary Fe–B–X systems : part 7: Fe–B–C

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Author: Miettinen, J.1; Visuri, V.-V.1; Fabritius, T.1;
Organizations: 1University of Oulu, Process Metallurgy Research Unit, P.O. Box 4300, 90014 University of Oulu, Finland
2University of Plovdiv, Faculty of Chemistry, 24 Tsar Asen str., 4000 Plovdiv, Bulgaria
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
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Language: English
Published: Polish Academy of Sciences, 2020
Publish Date: 2020-06-24


Thermodynamic description of the Fe-B-C system in its iron-rich corner is developed in the context of a new Fe-B-X (X = Cr, Ni, Mn, Si, Ti, V, C) database. The thermodynamic parameters of the binary sub-systems, Fe-B, Fe-C and B-C, are taken from earlier assessments modifying the B-C description. The parameters of the Fe-B-C system are optimized in this study using experimental thermodynamic and phase equilibrium data from the literature. Liquid, beta-rhombo-B and graphite phases are described using the substitutional solution model, while the ferrite (bcc), the austenite (fcc), the cementite (M₃C) and the M₂₃C₆ phases are described with the sublattice model and the borides, Fe₂B, FeB and B₄C, are treated as stoichiometric phases. A good correlation was obtained between the calculated and the experimental thermodynamic and phase equilibrium data. The description is recommended to be used at the composition region of wt% C + wt% B < 15 and at temperatures below 2700oC.

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Series: Archives of metallurgy and materials
ISSN: 1733-3490
ISSN-E: 2300-1909
ISSN-L: 1733-3490
Volume: 65
Issue: 2
Pages: 923 - 933
DOI: 10.24425/amm.2020.132840
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
215 Chemical engineering
Funding: This study was executed within the framework of the Genome of Steel profiling project. The Academy of Finland (project 311934) and Walter Ahlström Foundation are acknowledged for funding this work.
Copyright information: © 2020. The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (CC BY-NC 4.0, which permits the use, redistribution of the material in any medium or format, transforming and building upon the material, provided that the article is properly cited, the use is noncommercial, and no modifications or adaptations are made.