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Some Considerations of Nonideal Transformation‐Zone Profile
Author(s) -
HSUEH CHUNHWAY,
BECHER PAUL F.
Publication year - 1988
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.1151-2916.1988.tb05900.x
Subject(s) - transformation (genetics) , volume fraction , materials science , toughening , phase (matter) , cubic zirconia , toughness , mechanics , ceramic , geometry , composite material , mathematics , physics , chemistry , quantum mechanics , gene , biochemistry
The nonideal transformation‐zone profile, in which the volume fraction of transformed particles decreases with the increase in the lateral distance from crack surfaces, is considered for the stress‐induced phase transformation in ceramics containing zirconia. It is shown that one source of this nonideal transformation‐zone profile can be the size distribution of the transforming particles/grains. Then, an equation for toughening due to the existence of such a nonideal transformationzone profile is derived. In calculating the toughness, it is shown that the uncertainty in determining the transformationzone size, which can occur by attempts to fit it to an ideal zone profile, can be avoided by using the present approach.