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Thermodynamic modeling and experimental investigation of the MgO‐Y 2 O 3 ‐ZrO 2 system
Author(s) -
Roncallo Giacomo,
Cacciamani Gabriele,
Vacchieri Erica,
Ilatovskaia Mariia,
Saenko Ivan,
Fabrichnaya Olga
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17224
Subject(s) - eutectic system , differential thermal analysis , isothermal process , scanning electron microscope , analytical chemistry (journal) , materials science , atmospheric temperature range , microstructure , powder diffraction , energy dispersive x ray spectroscopy , thermal analysis , spectroscopy , diffraction , mineralogy , crystallography , thermal , chemistry , thermodynamics , metallurgy , physics , chromatography , optics , composite material , quantum mechanics
Solid‐state phase equilibria in the MgO‐Y 2 O 3 ‐ZrO 2 system as well as the equilibria including liquid were investigated in the whole‐compositional range using high‐temperature differential thermal analysis (DTA), X‐ray diffraction (XRD), and scanning electron microscopy combined with energy dispersive X‐ray spectroscopy (SEM/EDX). Isothermal sections at 1493, 1573, 1693, and 1923 K were constructed based on experimental studies. The presence of tie line between MgO and Y 4 Zr 3 O 12 in the temperature range between 1493 and 1573 K was confirmed. The eutectic melting in the MgO‐Y 2 O 3 ‐ZrO 2 system was established using DTA followed by SEM/EDX microstructure investigation. Based on the obtained experimental results, the thermodynamic database was derived.