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Influence of Residual Impurities on Phase Partitiioning and Grain Growth Processes of Y‐TZP Materials
Author(s) -
Stoto Tiziana,
Nauer Marco,
Carry Claude
Publication year - 1991
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/j.1151-2916.1991.tb06809.x
Subject(s) - impurity , dissolution , materials science , scanning electron microscope , phase (matter) , tetragonal crystal system , grain growth , intergranular corrosion , amorphous solid , mineralogy , analytical chemistry (journal) , metallurgy , chemical engineering , microstructure , crystallography , composite material , chemistry , chromatography , organic chemistry , engineering
Microstructural evolution at 1450°C of two 3 mol% Y 2 O 3 ─ZrO 2 tetragonal polycrystals (Y‐TZP) containing different residual impurity amounts has been investigated by analytical and scanning electron microscopy in order to clarify the role of the amorphous intergranular phases. Phase partitioning is interpreted as a process based on dissolution/reprecipitation reactions involving mass transport via the liquid impurity phase. Grain growth is inhibited by yttria migration before the phase equilibrium is reached, then increases drastically.