Abstract
This paper presents a theoretical analysis of quasi-equilibrium directional solidification of a quaternary melt. We consider the variation in the composition of phases in each portion of the sample and changes in phase composition for various types of phase reactions. The results indicate that the melt trajectory during directional solidification may belong only to those phase diagram elements corresponding to the crystallization of binary, ternary, or quaternary eutectics or single-phase crystallization regions. Using the directional solidification of a melt with the composition (at %) Cu 29.37, Ni 17.72, Fe 5.91, and S 47.00, we obtained a sample consisting of zones with different phase compositions: [Ni z (Fe,Cu)1 − z ]S1 ± δ single-phase zone, [Ni z (Fe,Cu)1 − z ]S1 ± δ + Cu5 ± x Fe1 ± x S4 binary eutectic mixture, and [Ni z (Fe,Cu)1 − z ]S1 ± δ + Cu5 ± x Fe1 ± x S4 + (Ni z Fe1 − z )S2 ternary eutectic mixture. In going from one zone to another, new phases appear and the average composition of the sample changes sharply, whereas the compositions of the melt and solid solution present in neighboring zones vary continuously. These results are consistent with theoretical concepts.
Similar content being viewed by others
References
Ariskin, A.A. and Barmina, G.S., Modelirovanie fazovykh ravnovesii pri kristallizatsii bazal’tovykh magm (Modeling of Phase Equilibria in Basaltic Magma Crystallization), Moscow: Nauka, 2000.
Kosyakov, V.I., Buzhdan, Ya.M., and Shestakov, V.A., Thermodynamic Analysis of Quasi-Equilibrium Directional Solidification, in Neformal’nye matematicheskie modeli v khimicheskoi termodinamike (Informal Mathematical Models in Chemical Thermodynamics), Novosibirsk: Nauka, 1991, pp. 130–153.
Kosyakov, V.I., Feasibility of Using Directional Solidification in Solving Petrological Problems, Geol. Geofiz., 1998, vol. 39, no. 9, pp. 1242–1253.
Kosyakov, V.I. and Sinyakova, E.F., Directional Solidification of Iron Nickel Sulfide Melts in the Monosulfide Solid Solution Region, Geokhimiya, 2005, no. 4, pp. 415–428.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.I. Kosyakov, E.F. Sinyakova, 2011, published in Neorganicheskie Materialy, 2011, Vol. 47, No. 6, pp. 738–742.
Rights and permissions
About this article
Cite this article
Kosyakov, V.I., Sinyakova, E.F. Preparation of eutectics by directional solidification of quaternary melts. Inorg Mater 47, 660–664 (2011). https://doi.org/10.1134/S002016851105013X
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S002016851105013X