ORAL

SESSION: MetalsWedAM-R10	3rd Intl. Symp. on Sustainable Metals & Alloys Processing
Wed Oct, 25 2017	Room: Maria Mercedes & Maria Beatriz
Session Chairs: Vera Vorob'eva; Ranjit Dalwatkar; Session Monitor: TBA

11:00: [MetalsWedAM01]
Three-Dimensional Computer Models as a Tool for Verification of Phase Diagrams
Vera Vorob'eva¹ ; Vasily Lutsyk¹ ; Maria Parfenova² ; ¹Institute of Physical Materials Science SB RAS, Ulan-Ude, Russian Federation; ²Tomsk State University of Control Systems and Radio-electronics, Tomsk, Russian Federation;
Paper Id: 80 [Abstract]

The innovation technology of assembling the space models of multidimensional phase diagrams from the entire totality of the geometric images corresponding to them is proposed. Basic principle of the design of the three-dimensional (3D) computer model of the ternary system T-x-y diagram is the assembling of 3D objects of its surfaces and phase regions. Finished T-x-y diagram 3D model allows to construct any arbitrarily assigned sections and to calculate mass balances of the coexisting phases in all stages of the crystallization for any arbitrarily assigned concentration. Moreover 3D computer models of phase diagrams are an effective tool for the verification of those experimentally constructed isothermal sections and isopleths, i.e., for checking the correctness of the interpretation of data, obtained from the experiment and the thermodynamic calculation. Such possibilities of 3D models can be seen on the examples of the using of the metal systems T-x-y diagrams - the bases of the creation of the materials, promising as the lead-free solders (Au-Ge-Sn, Ag-Ge-Sb, Ag-Au-Bi, Ag-Sb-Sn, Au-Bi-Sb, and so on). Their published data are not always deprived of contradictions. So, it is convenient to use the 3D computer models of T-x-y diagrams, designed according to the data of the different authors, for the agreement of the sections and for searching of contradictions in calculations or incorrect interpretation of experiment. This work was been performed under the program of fundamental research SB RAS (project 0336-2016-0006), it was partially supported by the RFBR (projects 15-43-04304, 17-08-00875) and the RSF (project 17-19-01171).

SESSION: Non-ferrousThuAM-R1	Barrios International Symposium on Sustainable Non-ferrous Smelting and Hydro/Electrochemical Processing (5th Intl. Symp. on Sustainable Non-ferrous Smelting and Hydro/Electrochemical Processing)
Thu Oct, 26 2017	Room: Condesa II
Session Chairs: TBA Session Monitor: TBA

15:30: [Non-ferrousThuAM07]
Crystallization Paths for System MgO-SiO2-Al2O3
Vasily Lutsyk¹ ; Anna Zelenaya¹ ; ¹Institute of Physical Materials Science SB RAS, Ulan-Ude, Russian Federation;
Paper Id: 63 [Abstract]

System MgO-SiO2-Al2O3 has a great practical importance, and its phase diagram can used for the description of properties of advanced and building materials as well as for the characterization of geological objects too. Data for invariant processes in the binary and ternary systems (with taking into account the existence and type of binary and ternary compounds) is the base for creation of schema of mono- and invariant equilibria. The system MgO-SiO2-Al2O3 includes four binary compounds and two ternary compounds. It’s characterized by 11 invariant transformations: three eutectics, one peritectic, five quasiperitectic equilibria and two four-phase regroupings of phases with polymorphous modifications of silicon oxide (cristobalite and tridymite). Obtained computer model of phase diagram for system MgO-SiO2-Al2O3 includes liquid immiscibility surface, 10 liquidus surfaces, 78 ruled surfaces, 11 horizontal complexes at the temperatures of invariant points, 21 two-phase regions and 29 three-phase regions. Such full model of phase diagram including all topological elements makes possible to calculate the horizontal and vertical sections and the crystallization paths in any part of phase diagram. The crystallization paths are confirmed by the diagrams of vertical mass balance, which permit to obtain the lists of intersected phase regions and the crystallization stages for given mass center over the entire temperature range. As a result we can identify the list of microconstituents for each concentration field the base of this investigation. Key words: phase diagram, computer model, crystallization paths, system MgO-SiO2-Al2O3. This work was been performed under the program of fundamental research SB RAS (project 0336-2016-0006), it was partially supported by the RFBR (projects 15-43-04304, 17-08-00875) and the RSF (project 17-19-01171).