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Effect of NiO on the Phase Stability and Microstructure of Yttria‐Stabilized Zirconia
Author(s) -
Delaforce Philip M.,
Yeomans Julie A.,
Filkin Neil C.,
Wright Gary J.,
Thomson Rachel C.
Publication year - 2007
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.1551-2916.2006.01464.x
Subject(s) - yttria stabilized zirconia , materials science , monoclinic crystal system , non blocking i/o , cubic zirconia , tetragonal crystal system , nickel , phase (matter) , nickel oxide , microstructure , substrate (aquarium) , chemical engineering , mineralogy , composite material , metallurgy , crystallography , chemistry , crystal structure , ceramic , geology , organic chemistry , engineering , catalysis , biochemistry , oceanography
Nickel oxide (NiO) was screen printed onto the surfaces of 3 and 8 mol% yttria‐stabilized zirconia (YSZ) dense pre‐fired substrates and then heat treated at temperatures from 1350° to 1550°C. The effect of NiO was dependent on the yttria content of the substrate. In 3 mol% YSZ, it was found to alter the phase composition from predominantly tetragonal with a small amount of cubic phase to one consisting of approximately equal amounts of cubic and monoclinic phase. The cubic grains were much larger than the monoclinic ones and contained more nickel. Furthermore, nickel was observed to migrate through the thickness of the tile, a distance of approximately 200 μm. In the 8 mol% YSZ substrates, the phase composition was unaltered, although large grains developed under the printed NiO layer and the nickel migration was confined to the extent of these large grains.