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Slip Systems in Al 2 O 3
Author(s) -
SNOW J. D.,
HEUER A. H.
Publication year - 1973
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.1151-2916.1973.tb15432.x
Subject(s) - slip (aerodynamics) , homogeneous , materials science , hydrostatic pressure , hydrostatic equilibrium , crystallography , geometry , physics , chemistry , mathematics , thermodynamics , quantum mechanics
Crystallographic notation for Al 2 O 3 is reviewed, with particular reference to the correct basis to be used in describing slip systems. A Groves‐and‐Kelly calculation showed that the combination of pyramidal slip on {11¯02}<11¯01> and basal slip on (0001){112¯0} will allow homogeneous deformation of Al 2 O 3 polycrystals. Furthermore, operation of either the {101¯1}<1¯011> or the {011¯2}<2¯021> slip system will also satisfy the Von Mises criterion, since each system is capable of 5 independent deformation modes. Electron microscopy of an Al 2 O 3 polycrystal deformed ≅5% at 1150°C under a hydrostatic confining pressure confirmed that pyramidal slip had occurred.