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Surface Relief Associated with Isothermal Martensite in Zirconia–3‐mol%‐Yttria Ceramics Observed by Atomic Force Microscopy
Author(s) -
Tsubakino Harushige,
Kuroda Yoshihide,
Niibe Masahito
Publication year - 1999
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.1151-2916.1999.tb02180.x
Subject(s) - materials science , monoclinic crystal system , isothermal process , tetragonal crystal system , yttria stabilized zirconia , cubic zirconia , diffusionless transformation , martensite , grain boundary , phase (matter) , ceramic , composite material , crystallography , metallurgy , microstructure , crystal structure , thermodynamics , chemistry , physics , organic chemistry
Surface relief associated with martensitic transformation—tetragonal‐to‐monoclinic phase transformation—that occurred during isothermal aging at temperatures of 400 and 473 K was observed via atomic force microscopy, using prepolished and thermally etched surfaces of zirconia–3 mol% yttria that was sintered at a temperature of 1923 K for 5 h. The isothermal martensitic transformation occurred first at grain boundaries and advanced into grain interiors as the aging time increased and then spread successively into the surrounding grains. The transformation area, which had an approximately round shape, increased as the aging time increased. The fine structure of the surface relief was composed of many tent shapes that were several nanometers high with an angle of ∼165°.