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Mechanically Induced Phase Transformation and Surface Segregation in Bismuth‐Doped Tetragonal Zirconia
Author(s) -
Gulino Antonino,
Egdell Russel G.,
Fragalà Ignazio
Publication year - 1998
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.1151-2916.1998.tb02406.x
Subject(s) - bismuth , materials science , tetragonal crystal system , raman spectroscopy , monoclinic crystal system , amorphous solid , phase (matter) , cubic zirconia , analytical chemistry (journal) , x ray photoelectron spectroscopy , crystallography , mineralogy , chemistry , optics , crystal structure , chemical engineering , ceramic , composite material , metallurgy , physics , organic chemistry , engineering , chromatography
Compact pressure causes a martensitic transformation of partially stabilized tetragonal bismuth‐doped ZrO 2 powders to the monoclinic phase. A similar effect is not observed when pelletization, followed by firing, of amorphous bismuth/ZrO 2 is performed. The stress‐induced transition has been monitored via X‐ray diffractometry, Raman spectroscopy, and Fourier transform infrared reflectivity. Surface bismuth segregation, which involves few ionic planes, has been probed by angle‐resolved X‐ray photoelectron spectroscopy. The bismuth segregation enthalpy has been evaluated.