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Stress‐Induced Transformation During Subcritical Crack Growth in Partially Stabilized Zirconia
Author(s) -
Lenz L. K.,
Heuer A. H.
Publication year - 1982
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.1151-2916.1982.tb10796.x
Subject(s) - tetragonal crystal system , materials science , monoclinic crystal system , orthorhombic crystal system , transmission electron microscopy , cubic zirconia , scanning electron microscope , fracture (geology) , crystallography , stress (linguistics) , composite material , fracture toughness , crystal structure , chemistry , nanotechnology , ceramic , linguistics , philosophy
Fracture surfaces of a commercial partially stabilized ZrO 2 that had undergone subcritical crack growth in H 2 0 were characterized by scanning and transmission electron microscopy. At high stress intensities (≥4.6 MPa·m −1/2 ), fracture was primarily trans granular, and coherent tetragonal ZrO 2 precipitates had undergone a martensitic transformation to monoclinic symmetry. At lower stress intensities, where power‐law crack growth occurred, fracture suflaces were primarily inter‐granular, and the tetragonal ZrO 2 had transformed to a new ZrO 2 polymorph with orthorhombic symmetry.
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