2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 1. Barrios Intl. Symp. / Non-ferrous Smelting & Hydro/Electrochemical Processing
| Editors: | Kongoli F, Palacios M, Buenger T, Meza JH, Delgado E, Joudrie MC, Gonzales T, Treand N |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2017 |
| Pages: | 264 pages |
| ISBN: | 978-1-987820-61-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Crystallization Paths for System MgO-SiO2-Al2O3
Vasily Lutsyk1; Anna Zelenaya1;1INSTITUTE OF PHYSICAL MATERIALS SCIENCE SB RAS, Ulan-Ude, Russian Federation;
Type of Paper: Regular
Id Paper: 63
Topic: 6
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).