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Indentation‐Induced Cracks and the Toughness Anisotropy of 9.4‐mol%‐Yttria‐Stabilized Cubic Zirconia Single Crystals
Author(s) -
Pajares Antonia,
Guiberteau Fernando,
DominguezRodriguez Arturo,
Heuer Arthur H.
Publication year - 1991
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.1151-2916.1991.tb06941.x
Subject(s) - indentation , materials science , perpendicular , composite material , cracking , yttria stabilized zirconia , cubic zirconia , anisotropy , surface (topology) , toughness , geometry , optics , ceramic , mathematics , physics
The crack systems associated with room‐temperature Vickers indentations on {001} surfaces in 9.4‐mol%‐Y 2 O 3 ‐stabilized cubic ZrO 2 single crystals are examined. The indentation‐induced radial cracks are not always perpendicular to the free surface, as is usually assumed, and the surface traces are therefore not a reliable guide to the nature of the cracking. In fact, indentations with 〈100〉 diagonals do not form cracks on {010}, but form secondary radial cracks on inclined planes and noncoplanar median cracks on (110) or (1 1 0).