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Ferroelastic Domain Switching as a Toughening Mechanism in Tetragonal Zirconia
Author(s) -
Virkar Anil V.,
Matsumoto Roger L. K.
Publication year - 1986
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.1151-2916.1986.tb07341.x
Subject(s) - toughening , ferroelasticity , tetragonal crystal system , materials science , cubic zirconia , monoclinic crystal system , toughness , composite material , fracture toughness , ceramic , crystallography , crystal structure , ferroelectricity , chemistry , dielectric , optoelectronics
X‐ray diffraction data are presented in support of the existence of ferroelasticity in tetragonal zirconia. Reorientation of ferroelastic domains by externally applied stress is proposed as a toughening mechanism. Toughening by this mechanism can occur in addition to transformation toughening and also explains high toughness of some zirconias which exhibit no transformation to the monoclinic form. Zirconia ceramics toughened by the ferroelastic mechanism have the potential to retain high toughness at elevated temperature unlike transformation toughening.