The Paton Welding Journal, 2011, №10



2011 №10 (11)

2011 №10 (02)

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The Paton Welding Journal, 2011, #10, 2-4 pages  

PREDICTION OF THERMODYNAMIC PROPERTIES OF MELTS OF MgO-Al₂O₃-SiO₂-CaF₂ SYSTEM

I.A. GONCHAROV¹, V.I. GALINICH¹, D.D. MISHCHENKO¹, M.A. SHEVCHENKO² and V.S. SUDAVTSOVA²

¹E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
²Taras Shevchenko National University of Kiev, Ukraine
 
 
Abstract
The calculation procedure is proposed for prediction of thermodynamic properties of simple slag melts, allowing for liquidus coordinates of constitutional diagrams. Excess integral functions calculated for more complex systems are given. The possibility of controlling the thermodynamic activity of SiO₂ in slag and, hence, silicon reduction process is shown.
 
 
Keywords: arc welding, high-strength steels, fused flux, slag melts, thermodynamic properties, SiO₂ activity
 
 
Received:                ??.??.??
Published:               28.10.11
 
 
References
1. Fabrichnaya, O. (2000) Thermodynamic modelling of melting in the system FeO-MgO-SiO₂-O₂ at pressure of 1 bar. CALPHAD, 24(6), 113-131.
2. Wang, Ch., Zinkevich, M., Aldinger, F. (2004) On the thermodynamic modelling of the Zr-O system. Ibid., 28, 281-292.
3. Chen, M., Hallstedt, B., Gauckler, L.J. (2004) Thermodynamic modelling of the ZrO₂-YO_1.5 system. Solid State Ionics, 170, 255-274.
4. Shornikov, S.I. (2006) Thermodynamic properties of melts of system MgO-SiO₂. Vestnik Otd. Nauk o Zemle RAN, 1(22), 1-3.
5. Shornikov, S.I. (2004) Thermodynamic properties of melts of system Al₂O₃-SiO₂. Ibid., 1, 1-3.
6. Muggianu, Y.O., Gambino, N.N., Bros, J.P. (2001) Enthalpie formation of liquid alloys bismuth-gallium-tin at 223 °C. J. Alloys and Compounds, 321(1), 183-200.
7. Jung, I.-H., Decterov, S.A., Peuon, A.D. (2004) Critical thermodynamic evaluation an optimization of the MgO-Al₂O₃-SiO₂ systems. J. Phase Equilibria Diffusion, 25(4), 329-345.

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