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1

Janovszky, Dóra, and Kinga Tomolya. "Designing Amorphous/Crystalline Composites by Liquid-Liquid Phase Separation." Materials Science Forum 790-791 (May 2014): 473–78. http://dx.doi.org/10.4028/www.scientific.net/msf.790-791.473.

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The Cu-Zr-Ag system is characterized by a miscibility gap. The liquid separates into Ag-rich and Cu-Zr rich liquids. Yttrium was added to the Cu-Zr-Ag and Cu-Zr-Ag-Al systems and its influence on liquid immiscibility was studied. This alloying element has been chosen to check the effect of the heat of mixing between silver and the given element. In the case of Ag-Y system it is highly negative (-29 kJ/mol). The liquid becomes immiscible in the Cu-Zr-Ag-Y system. To the effect of Y addition the quaternary liquid decomposed into Ag-Y rich and Cu-Zr rich liquids. The Y addition increased the field of miscibility gap. An amorphous/crystalline composite with 6 mm thickness has been successfully produced by liquid-liquid separation based on preliminary calculation of its composition. The matrix was Cu38Zr48Al6Ag8 and the crystalline phases were Ag-Y rich separate spherical droplets.
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2

Hong, S. Y., W. H. Guo, and H. W. Kui. "Metastable liquid miscibility gap in Pd–Si and its glass-forming ability: Part III." Journal of Materials Research 14, no. 9 (September 1999): 3668–72. http://dx.doi.org/10.1557/jmr.1999.0495.

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The metastable liquid miscibility gap of Pd–Si is determined structurally. The glass-forming ability of Pd–Si is then discussed in the light of the metastable liquid miscibility gap. Analysis indicates that it does not favor the formation of glass.
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3

Wang, Zhong Yuan, Jie He, Bai Jun Yang, Hong Xiang Jiang, Jiu Zhou Zhao, Tong Min Wang, and Hong Ri Hao. "Liquid Phase Separation and Dual Glassy Structure Formation of Designed Zr-Ce-Co-Cu Alloys." Materials Science Forum 849 (March 2016): 100–106. http://dx.doi.org/10.4028/www.scientific.net/msf.849.100.

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Development of liquid-phase separated bulk metallic glasses is retarded due to difficulties in finding of immiscible systems with high glass-forming ability (GFA) of coexistent liquids. Zr-Ce alloy is a typical liquid immiscible system characterized by a liquid miscibility gap. We added Co and Cu into the Zr-Ce immiscible system and optimized the composition of the designed Zr-Ce-Co-Cu immiscible alloys. The solidification experiments were carried out for the quaternary alloys. The result indicates that the melt separated into ZrCo-rich and CeCu-rich liquids upon cooling through the miscibility gap. By optimizing the relative atomic ratio of Co:Cu, the coexistent ZrCo-rich and CeCu-rich liquids automatically assembled eutectic compositions during the liquid-liquid phase separation (LLPS). Under the condition of fast quenching, the two liquids subsequently undergo liquid-to-glass transition, resulting in the formation of composite structure with two glasses in the samples. We successfully developed phased-separated metallic glasses based on the Zr-Ce-Co-Cu immiscible alloys. This work not only strengthens the understanding in the LLPS but also provides a new strategy on the design of the dual glassy composites.
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4

Plevachuk, Yu, V. Filippov, V. Kononenko, P. Popel, A. Rjabina, V. Sidorov, and V. Sklyarchuk. "Investigation of the miscibility gap region in liquid Ga–Pb alloys." International Journal of Materials Research 94, no. 9 (September 1, 2003): 1034–39. http://dx.doi.org/10.1515/ijmr-2003-0187.

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Abstract The miscibility gap of the Ga–Pb system has been investigated by different experimental methods and techniques. Viscosity, acoustic and electrical conductivity measurements were carried out through the entire immiscibility region. Possible reasons of revealed discrepancies in the absolute values of the phase separation temperatures are discussed in relation with peculiarities of the experimental methods employed. The shape of the miscibility gap has been analysed.
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5

Sun, Xiao Jun, Jie He, and Jiu Zhou Zhao. "Microstructure Formation and Nanoindentation Behavior of Rapidly Solidified Cu-Fe-Zr Immiscible Alloys." Materials Science Forum 993 (May 2020): 39–44. http://dx.doi.org/10.4028/www.scientific.net/msf.993.39.

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The binary Cu-Fe system is characterized by a metastable liquid miscibility gap. WhenZr is added into the Cu-Fe alloy, the miscibility gap can be extended into Cu-Fe-Zr ternary system. In the present study Cu-Fe-Zr alloys were prepared by single-roller melting-spinning method, and the samples were characterized by the SEM, EDS, HRTEM and nanoidentation. The results show that liquid-liquid phase separation into CuZr-rich and FeZr-rich liquids takes place during rapid cooling the Cu-Fe-Zr alloy, and the mechanism depends on the atomic ratio of Cu to Fe. With increasing Zr content, the size of secondary phase formed by the liquid-liquid phase separation reduces to nanoscale. The structure with amorphous Cu-rich nanoparticles embedded in the amorphous Fe-rich matrix was obtained in the as-quenched Cu20Fe20Zr60 alloy. For its structure particularity of the Cu20Fe20Zr60 sample, mechanical evaluation was carried out by using nanoindentation.
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6

Plevachuk, Yu, V. Didoukh, and B. Sokolovskii. "The miscibility gap region in liquid ternary alloys." Journal of Non-Crystalline Solids 250-252 (August 1999): 325–28. http://dx.doi.org/10.1016/s0022-3093(99)00257-4.

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7

Leshchenko, Egor D., and Jonas Johansson. "Surface energy driven miscibility gap suppression during nucleation of III–V ternary alloys." CrystEngComm 23, no. 31 (2021): 5284–92. http://dx.doi.org/10.1039/d1ce00743b.

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8

Tang, C., Y. Du, H. Xu, S. Hao, and L. Zhang. "Study on the nonexistence of liquid miscibility gap in the Ce-Mn system." Journal of Mining and Metallurgy, Section B: Metallurgy 43, no. 1 (2007): 21–28. http://dx.doi.org/10.2298/jmmb0701021t.

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To ascertain whether the liquid miscibility gap exists in the Ce-Mn system, 3 key alloys are prepared by arc melting the pure elements, annealed at specified temperature for 20 minutes, quenched in ice water and then subjected to X-ray diffraction (XRD) analysis for phase identification and to scanning electron microscopy (SEM) with energy dispersive X-ray analysis for microstructure observation and composition analysis. The XRD examination indicated that terminal solutions based on Ce and Mn exist in the water-quenched alloys. No compound was detected. Microstructure observation and composition analysis indicate the nonexistence of the liquid miscibility gap. The newly assessed Ce-Mn phase diagram was presented. .
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9

Shim, Jae-Hyeok, Hyung-Nae Lee, Heon Phil Ha, Young Whan Cho, and Eui-Pak Yoon. "Liquid miscibility gap in the Al–Pb–Sn system." Journal of Alloys and Compounds 327, no. 1-2 (August 2001): 270–74. http://dx.doi.org/10.1016/s0925-8388(01)01426-8.

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10

Plevachuk, Yu, V. Didoukh, and B. Sokolovskii. "The miscibility gap region in liquid metal-chalcogen alloys." Journal of Molecular Liquids 93, no. 1-3 (September 2001): 225–28. http://dx.doi.org/10.1016/s0167-7322(01)00234-3.

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11

Curiotto, S., R. Greco, N. H. Pryds, E. Johnson, and L. Battezzati. "The liquid metastable miscibility gap in Cu-based systems." Fluid Phase Equilibria 256, no. 1-2 (August 2007): 132–36. http://dx.doi.org/10.1016/j.fluid.2006.10.003.

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12

Plevachuk, Yu, V. Didoukh, and B. Sokolovskii. "Miscibility gap and liquid-liquid equilibrium in the system In-Tl-Se." Journal of Phase Equilibria 20, no. 4 (July 1999): 404–6. http://dx.doi.org/10.1361/105497199770340932.

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13

Didoukh, V., B. Sokolovskii, and Yu Plevachuk. "The miscibility gap region and properties of liquid ternary alloys." Journal of Physics: Condensed Matter 9, no. 16 (April 21, 1997): 3343–47. http://dx.doi.org/10.1088/0953-8984/9/16/006.

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14

Kozieł, T., Z. Kȩdzierski, A. Zielińska-Lipiec, and J. Latuch. "The microstructure of melt-spun alloys with liquid miscibility gap." Journal of Physics: Conference Series 144 (January 1, 2009): 012093. http://dx.doi.org/10.1088/1742-6596/144/1/012093.

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15

Nie, Y. X., and H. W. Kui. "On the metastable liquid miscibility gap in Pd-Ni-P." Journal of Non-Crystalline Solids 518 (August 2019): 113–17. http://dx.doi.org/10.1016/j.jnoncrysol.2019.01.040.

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16

KOZIEŁ, T., Z. KĘDZIERSKI, A. ZIELIŃSKA-LIPIEC, J. LATUCH, and G. CIEŚLAK. "TEM studies of melt-spun alloys with liquid miscibility gap." Journal of Microscopy 237, no. 3 (March 2010): 267–70. http://dx.doi.org/10.1111/j.1365-2818.2009.03240.x.

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17

Kim, Dong Ik, and Reza Abbaschian. "The metastable liquid miscibility gap in Cu-Co-Fe alloys." Journal of Phase Equilibria 21, no. 1 (January 2000): 25–31. http://dx.doi.org/10.1361/105497100770340381.

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18

Bhansali, Ameet S., and A. K. Mallik. "Calculation of liquid miscibility gap in cd — pb — zn system." Calphad 11, no. 2 (April 1987): 117–26. http://dx.doi.org/10.1016/0364-5916(87)90003-4.

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19

Janovszky, D., K. Tomolya, A. Sycheva, and G. Kaptay. "Stable miscibility gap in liquid Cu–Zr–Ag ternary alloy." Journal of Alloys and Compounds 541 (November 2012): 353–58. http://dx.doi.org/10.1016/j.jallcom.2012.07.015.

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20

Zhou, Z. M., Jianrong Gao, F. Li, Y. K. Zhang, Y. P. Wang, and M. Kolbe. "On the metastable miscibility gap in liquid Cu–Cr alloys." Journal of Materials Science 44, no. 14 (July 2009): 3793–99. http://dx.doi.org/10.1007/s10853-009-3511-y.

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21

Zhu, Chao Fan, Shi Dong Lin, Jiang Wang, Mao Hua Rong, Guang Hui Rao, and Huai Ying Zhou. "Thermodynamic Re-Assessment of the Mn-La Binary System." Materials Science Forum 850 (March 2016): 21–26. http://dx.doi.org/10.4028/www.scientific.net/msf.850.21.

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In this work, eleven Mn-La alloys were investigated experimentally by means of thermal analysis. The temperatures of the invariant reactions in the Mn-La binary system were determined. To confirm whether the liquid miscibility gap exists in the Mn-La system, one key alloy (Mn72La28) was prepared and then checked by X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Microstructure observation and composition analysis indicated the nonexistence of the liquid miscibility gap. Based on the experimental results obtained in the present work and the critical review of the available experimental data in the published literature, a set of self-consistent thermodynamic parameters for the Mn-La system was obtained using the CALPHAD method by thermodynamic optimization of the selected experimental data.
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22

Suzuki, Masanori, and Toshihiro Tanaka. "Thermodynamic Prediction of Spinodal Decomposition in Multi-component Silicate Glass for Design of Functional Porous Glass Materials." High Temperature Materials and Processes 31, no. 4-5 (October 30, 2012): 323–28. http://dx.doi.org/10.1515/htmp-2012-0086.

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AbstractThe authors have investigated metastable phase separation in multi-component silicate glass for the fabrication of porous glass from multi-component slag. Spinodal decomposition forms an interconnected microstructure in glass spontaneously, and porous glass is obtained by leaching one of the decomposed phases with an acid solution. This porous glass can be used for a filter to remove impurities in polluted water or air. In this study, the metastable miscibility gap was predicted in multi-component silicate glass using thermodynamic analyses where glass was regarded as a super-cooled liquid phase. Occurrence of spinodal decomposition was observed in annealed glass, and it corresponded to the predicted miscibility gap. Then, we fabricated porous glass using spinodal decomposition in multi-component borosilicate glass and by removing one of the decomposed phases. Furthermore, for the creation of functional porous glass applicable for environmental purification, the spinodal decomposition was prepared in multi-component borosilicate glass containing titanium oxide based on the predicted metastable miscibility gap in multi-component silicate glass.
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23

Hübner, Martin, and Mirjana Minceva. "Microfluidics approach for determination of the miscibility gap of multicomponent liquid-liquid systems." Experimental Thermal and Fluid Science 112 (April 2020): 109971. http://dx.doi.org/10.1016/j.expthermflusci.2019.109971.

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24

Leshchenko, Egor D., and Jonas Johansson. "Role of Thermodynamics and Kinetics in the Composition of Ternary III-V Nanowires." Nanomaterials 10, no. 12 (December 18, 2020): 2553. http://dx.doi.org/10.3390/nano10122553.

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We explain the composition of ternary nanowires nucleating from a quaternary liquid melt. The model we derive describes the evolution of the solid composition from the nucleated-limited composition to the kinetic one. The effect of the growth temperature, group V concentration and Au/III concentration ratio on the solid-liquid dependence is studied. It has been shown that the solid composition increases with increasing temperature and Au concentration in the droplet at the fixed In/Ga concentration ratio. The model does not depend on the site of nucleation and the geometry of monolayer growth and is applicable for nucleation and growth on a facet with finite radius. The case of a steady-state (or final) solid composition is considered and discussed separately. While the nucleation-limited liquid-solid composition dependence contains the miscibility gap at relevant temperatures for growth of InxGa1−xAs NWs, the miscibility gap may be suppressed completely in the steady-state growth regime at high supersaturation. The theoretical results are compared with available experimental data via the combination of the here described solid-liquid and a simple kinetic liquid-vapor model.
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25

Frolkova, Anastasia V. "Topological Invariants of Vapor–Liquid, Vapor–Liquid–Liquid and Liquid–Liquid Phase Diagrams." Entropy 23, no. 12 (December 10, 2021): 1666. http://dx.doi.org/10.3390/e23121666.

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The study of topological invariants of phase diagrams allows for the development of a qualitative theory of the processes being researched. Studies of the properties of objects in the same equivalence class may be carried out with the aim of predicting the properties of unexplored objects from this class, or predicting the behavior of a whole system. This paper describes a number of topological invariants in vapor–liquid, vapor–liquid–liquid and liquid–liquid equilibrium diagrams. The properties of some invariants are studied and illustrated. It is shown that the invariant of a diagram with a miscibility gap can be used to distinguish equivalence classes of phase diagrams, and that the balance equation of the singular-point indices, based on the Euler characteristic, may be used to analyze the binodal-surface structure of a quaternary system.
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26

Zemb, Thomas, Rose Rosenberg, Stjepan Marčelja, Dirk Haffke, Jean-François Dufrêche, Werner Kunz, Dominik Horinek, and Helmut Cölfen. "Phase separation of binary mixtures induced by soft centrifugal fields." Physical Chemistry Chemical Physics 23, no. 14 (2021): 8261–72. http://dx.doi.org/10.1039/d0cp01527j.

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We use the model system ethanol–dodecane to demonstrate that giant critical fluctuations induced by easily accessible weak centrifugal fields as low as 2000g can be observed above the miscibility gap even far from the critical point of a binary liquid mixture.
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27

Plevachuk, Yu, V. Filippov, V. Kononenko, P. Popel, A. Rjabina, V. Sidorov, and V. Sklyarchuk. "Investigation of the miscibility gap region in liquid Ga–Pb alloys." Zeitschrift für Metallkunde 94, no. 9 (September 2003): 1034–39. http://dx.doi.org/10.3139/146.031034.

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28

Plevachuk, Yu O., V. M. Sklyarchuk, O. D. Alekhin, and L. A. Bulavin. "Viscosity of liquid Ga-Pb alloys in the miscibility gap region." Journal of Physical Studies 9, no. 4 (2005): 333–36. http://dx.doi.org/10.30970/jps.09.333.

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29

Maruyama, K., H. Hoshino, H. Ikemoto, T. Miyanaga, and H. Endo. "Local structure of liquid Rb–Se mixtures near the miscibility gap." Journal of Non-Crystalline Solids 353, no. 32-40 (October 2007): 3017–21. http://dx.doi.org/10.1016/j.jnoncrysol.2007.05.032.

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30

Gránásy, L., and L. Ratke. "Homogeneous nucleation within the liquid miscibility gap of Zn-Pb alloys." Scripta Metallurgica et Materialia 28, no. 11 (June 1993): 1329–34. http://dx.doi.org/10.1016/0956-716x(93)90477-a.

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31

Curiotto, Stefano, Livio Battezzati, Erik Johnson, Mauro Palumbo, and Nini Pryds. "The liquid metastable miscibility gap in the Cu–Co–Fe system." Journal of Materials Science 43, no. 9 (May 2008): 3253–58. http://dx.doi.org/10.1007/s10853-008-2540-2.

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32

Taglialavore, A. P., W. M. Kriven, and S. H. Risbud. "Microstructural development of rapidly solidified, phase-separated SiO2-Al2O3 glass." Proceedings, annual meeting, Electron Microscopy Society of America 44 (August 1986): 442–43. http://dx.doi.org/10.1017/s042482010014378x.

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A metastable miscibility gap has been shown to exist oyer much of the SiO2(s) -mullite(s) phase field by various indirect methods. The various proposed boundaries of this liquid-liquid immiscibility region, however, significantly disagree in their widths and critical point positions. The overall aim of our research is to directly determine the miscibility gap boundaries by using TEM/EDS on suitably equilibrated phases of rapidly solidified SiO2-Al2O3 glass. Rapid solidification by roller quenching (∼106°C/sec) and by ice- water quenching (~1035°C/sec) was used so that a wide range of compositions could be studied. SiO2-Al2O3 melts with more than ∼30 wt% Al2O3 readily crystallize when slowly cooled. A suitable microstructure for EDS requires homogeneous phases that are separated by sharp interfaces, and are large enough to withstand beam damage. In an attempt to meet these requirements, the as-quenched glass microstructures were developed by annealing for various times at suitable temperatures.
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33

Plevachuk, Yu, V. Didoukh, and B. Sokolovskii. "The miscibility gap region and liquid–liquid equilibrium in immiscible In–Tl–Te alloys." Journal of Alloys and Compounds 274, no. 1-2 (June 1998): 206–8. http://dx.doi.org/10.1016/s0925-8388(98)00554-4.

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34

Manasijevic, Dragan, Dragana Zivkovic, Iwao Katayama, and Zivan Zivkovic. "Calculation of activities in some gallium-based systems with a miscibility gap." Journal of the Serbian Chemical Society 68, no. 8-9 (2003): 665–75. http://dx.doi.org/10.2298/jsc0309665m.

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The calculations of thermodynamic properties in some gallium-based systems with a miscibility gap ? Ga?Tl, Ga?Hg and Ga?Pb are presented in this paper. The determination of the gallium activities in the mentioned liquid alloys was based on their known phase diagrams using the Zhang-Chou method for calculating activities from phase diagrams involving two liquid or solid coexisting phases. The activities of gallium in Ga?Tl, Ga?Hg and Ga?Pb system were calculated in the 973?1273 K, 573?873 K and 1000?1100 K temperature ranges, respectively. The activities of the other component in all the investigated systems were obtained by the Gibbs-Duhem equation. The results of the calculations are compared with literature data.
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35

Kolbe, M., and J. R. Gao. "Liquid phase separation of Co–Cu alloys in the metastable miscibility gap." Materials Science and Engineering: A 413-414 (December 2005): 509–13. http://dx.doi.org/10.1016/j.msea.2005.08.170.

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36

Sanloup, C., and Y. Fei. "Closure of the Fe–S–Si liquid miscibility gap at high pressure." Physics of the Earth and Planetary Interiors 147, no. 1 (October 2004): 57–65. http://dx.doi.org/10.1016/j.pepi.2004.06.008.

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37

Lau, M. T., S. Lan, Y. L. Yip, and H. W. Kui. "A metastable liquid state miscibility gap in undercooled Pd–Ni–P melts." Journal of Non-Crystalline Solids 358, no. 18-19 (September 2012): 2667–73. http://dx.doi.org/10.1016/j.jnoncrysol.2012.06.022.

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38

Plevachuk, Yu, V. Sklyarchuk, O. Alekhin, and O. Bilous. "Viscosity of liquid binary Pb–Zn alloys in the miscibility gap region." Journal of Non-Crystalline Solids 391 (May 2014): 12–16. http://dx.doi.org/10.1016/j.jnoncrysol.2014.03.004.

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39

Zhou, W. Z., Z. D. Wu, Y. F. Lo, and H. W. Kui. "Determination of the complete metastable liquid miscibility gap in Pd–Ni–P." Journal of Non-Crystalline Solids 432 (January 2016): 420–25. http://dx.doi.org/10.1016/j.jnoncrysol.2015.10.042.

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40

Plevachuk, Yu, V. Sklyarchuk, O. Alekhin, and L. Bulavin. "Viscosity of liquid In–Se–Tl alloys in the miscibility gap region." Journal of Alloys and Compounds 452, no. 1 (March 2008): 174–77. http://dx.doi.org/10.1016/j.jallcom.2006.12.160.

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41

Telle, Rainer, Fabian Greffrath, and Robert Prieler. "Direct observation of the liquid miscibility gap in the zirconia–silica system." Journal of the European Ceramic Society 35, no. 14 (November 2015): 3995–4004. http://dx.doi.org/10.1016/j.jeurceramsoc.2015.07.015.

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42

Uebber, N., and L. Ratke. "Undercooling and nucleation within the liquid miscibility gap of Zn-Pb alloys." Scripta Metallurgica et Materialia 25, no. 5 (May 1991): 1133–37. http://dx.doi.org/10.1016/0956-716x(91)90516-4.

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43

Ohnuma, I., T. Saegusa, Y. Takaku, C. P. Wang, X. J. Liu, R. Kainuma, and K. Ishida. "Microstructural Evolution of Alloy Powder for Electronic Materials with Liquid Miscibility Gap." Journal of Electronic Materials 38, no. 1 (September 10, 2008): 2–9. http://dx.doi.org/10.1007/s11664-008-0537-x.

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44

Inui, M., and S. Takeda. "Structure and thermodynamic properties of liquid BiGa alloys with miscibility gap." Journal of Non-Crystalline Solids 156-158 (May 1993): 153–56. http://dx.doi.org/10.1016/0022-3093(93)90151-m.

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45

Grugel, R. N., and Shinwoo Kim. "The role of gravity during solidification processing in systems exhibiting a liquid-liquid miscibility gap." Advances in Space Research 13, no. 7 (July 1993): 225–28. http://dx.doi.org/10.1016/0273-1177(93)90376-m.

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46

Derimow, Nicholas, and Reza Abbaschian. "Liquid Phase Separation in High-Entropy Alloys—A Review." Entropy 20, no. 11 (November 20, 2018): 890. http://dx.doi.org/10.3390/e20110890.

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It has been 14 years since the discovery of the high-entropy alloys (HEAs), an idea of alloying which has reinvigorated materials scientists to explore unconventional alloy compositions and multicomponent alloy systems. Many authors have referred to these alloys as multi-principal element alloys (MPEAs) or complex concentrated alloys (CCAs) in order to place less restrictions on what constitutes an HEA. Regardless of classification, the research is rooted in the exploration of structure-properties and processing relations in these multicomponent alloys with the aim to surpass the physical properties of conventional materials. More recent studies show that some of these alloys undergo liquid phase separation, a phenomenon largely dictated by low entropy of mixing and positive mixing enthalpy. Studies posit that positive mixing enthalpy of the binary and ternary components contribute substantially to the formation of liquid miscibility gaps. The objective of this review is to bring forth and summarize the findings of the experiments which detail liquid phase separation (LPS) in HEAs, MPEAs, and CCAs and to draw parallels between HEAs and the conventional alloy systems which undergo liquid-liquid separation. Positive mixing enthalpy if not compensated by the entropy of mixing will lead to liquid phase separation. It appears that Co, Ni, and Ti promote miscibility in HEAs/CCAs/MPEAs while Cr, V, and Nb will raise the miscibility gap temperature and increase LPS. Moreover, addition of appropriate amounts of Ni to CoCrCu eliminates immiscibility, such as in cases of dendritically solidifying CoCrCuNi, CoCrCuFeNi, and CoCrCuMnNi.
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47

Kolbe, Matthias, J. R. Gao, and S. Reutzel. "Solidification of Co-Cu Alloys in the Metastable Miscibility Gap under Low Gravity Conditions." Materials Science Forum 508 (March 2006): 455–60. http://dx.doi.org/10.4028/www.scientific.net/msf.508.455.

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Liquid Cu-Co shows a metastable miscibility gap where the homogeneous melt separates into the Co-rich L1-liquid and the Cu-rich L2-liquid. The required undercooling of the melt of > 120 K can be achieved by containerless methods as electromagnetic levitation, laser melting or drop tube processing. Due to the large undercooling, rapid solidification of the melt is favoured and preserves microstructure features of the metastable (liquid) phases. In Co-84.0 at% Cu alloy the L1- phase nucleates in the Cu-rich majority phase L2 as a dispersion of spherical droplets. Convective flow in the liquid influences largely the time evolution and the nature of the droplet dispersion and makes a theoretical description of the droplet growth extremely difficult. In the present work droplet dispersions are compared which formed under processing methods with different levels of convection: (i) (Terrestrial) electromagnetic levitation (EML), (ii) processing in the TEMPUS facility under parabolic flight conditions and (iii) processing in an 8 m drop tube. The distributions of droplet radii of the L1-phase has been measured in the solidified samples. EML processing leads to significant convection in the melt which causes coagulation of droplets. Reduced gravity conditions in the TEMPUS facility during parabolic flight or in a drop tube can decrease convection, but effects of the convective flow on the dispersion of droplets are still present. The need for experiments under micro-gravity conditions is evident from the results.
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48

Ilatovskaia, M., and O. Fabrichnaya. "Liquid Immiscibility and Thermodynamic Assessment of the Al2O3–TiO2–SiO2 System." Journal of Phase Equilibria and Diffusion 43, no. 1 (January 19, 2022): 15–31. http://dx.doi.org/10.1007/s11669-021-00935-4.

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AbstractPhase equilibria in the TiO2–SiO2 system have been studied experimentally using DTA and SEM/EDX. The thermodynamic parameters for the TiO2–SiO2 system have been assessed considering new experimental data of the present work and from the literature. Moreover, the miscibility of the liquid in the Al2O3–TiO2–SiO2 system has been studied at 2013 K in air and shrinkage of the miscibility gap at 3.8 mol% Al2O3 has been demonstrated. The experimental data obtained in the present work and literature as well as the thermodynamic databases for the binary Al2O3–TiO2, TiO2–SiO2, and Al2O3–SiO2 systems have been used to derive the thermodynamic description of the Al2O3–TiO2–SiO2 system using the CALPHAD approach. Solid phases have been modeled using the compound energy formalism. The liquid phase has been described by the two-sublattice partially ionic liquid model. A set of self-consistent parameters have been proposed, which resulted in a reasonably good agreement between the calculated and experimental data on the phase equilibria, liquid immiscibility, and thermodynamic properties in the Al2O3–TiO2–SiO2 system.
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49

Arefiev, Anton V., Anton Shatskiy, Altyna Bekhtenova, and Konstantin D. Litasov. "Phonolite-Carbonatite Liquid Immiscibility at 3–6 GPa." Minerals 13, no. 3 (March 20, 2023): 443. http://dx.doi.org/10.3390/min13030443.

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Liquid immiscibility plays an important role in the formation of carbonatites and associated alkaline Si-undersaturated magmas. Experiments in the sodium carbonate-aluminosilicate systems suggest that the carbonate-silicate miscibility gap is limited by crustal and shallow mantle pressures (up to 2.5 GPa). Unlike in the potassium-rich carbonate-aluminosilicate systems, the carbonate-silicate miscibility gap was established at pressures of 3.5–6 GPa. It is therefore interesting to elucidate the immiscibility range under intermediate pressures, corresponding to 100–200 km depths. Here we conducted experiments over 3–6 GPa and 1050–1500 °C in the systems corresponding to immiscible melts obtained by partial melting of carbonated pelite (DG2) at 6 GPa and 1200 °C. We found that partial melting begins with the alkali-rich carbonatite melt, while immiscible phonolite melt appears over 1050–1200 °C at 3 GPa, 1200 °C at 4.5 GPa, and 1200–1500 °C at 6 GPa. As pressure decreases from 6 to 3 GPa, Na becomes less compatible, and the concentration of the jadeite component in clinopyroxene decreases by a factor of 1.5–6. As a result, the compositions of the immiscible phonolite and carbonatite melts evolve from ultrapotassic (K2O/Na2O weight ratio = 10–14) resembling silicic and carbonatitic micro-inclusions in diamonds from kimberlites and placers worldwide to moderately potassic (K2O/Na2O = 1–2), which may correspond to phonolitic and associated carbonatitic melts of the spinel facies of the shallow mantle.
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50

Hudon, P. "Disappearance of the Liquid-Liquid Miscibility Gap in the System CaO-MgO-SiO2 at High Pressure." Mineralogical Magazine 58A, no. 1 (1994): 434–35. http://dx.doi.org/10.1180/minmag.1994.58a.1.226.

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