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Microstructural Evolution in Ca‐PSZ and the Room‐Temperature Instability of Tetragonal ZrO 2
Author(s) -
DICKERSON ROBERT M.,
SWAIN MICHAEL V.,
HEUER ARTHUR H.
Publication year - 1987
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.1151-2916.1987.tb04970.x
Subject(s) - ostwald ripening , tetragonal crystal system , kinetics , materials science , atmospheric temperature range , instability , microstructure , mineralogy , chemical engineering , crystallography , thermodynamics , nanotechnology , chemistry , metallurgy , crystal structure , physics , quantum mechanics , mechanics , engineering
Microstructural evolution of a 7.8 mol% Ca‐PSZ, fired at 1870°C and subsequently aged at 1300°C, was studied and correlated with the mechanical properties. The morphology, rafting, and subsequent coarsening of the tetragonal ( t ) ZrO 2 precipitates were of particular interest, as was the instability of some of the t ‐ZrO 2 particles during room‐temperature aging. Precipitate coarsening kinetics (Ostwald ripening) was also studied. Over the limited time range studied (136 h), the interface reaction dominated the kinetics.