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Stress Relaxation in PZT
Author(s) -
ESAKLUL K. A.,
GERBERICH W. W.,
KOEPKE B. G.
Publication year - 1980
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.1151-2916.1980.tb10641.x
Subject(s) - activation energy , materials science , deformation (meteorology) , relaxation (psychology) , stress relaxation , stress (linguistics) , dislocation , ceramic , composite material , deformation mechanism , volume (thermodynamics) , logarithm , thermodynamics , creep , chemistry , physics , microstructure , mathematics , psychology , social psychology , linguistics , philosophy , mathematical analysis
Time‐dependent deformation in the sonar transducer ceramic, PZT, was studied by stress‐relaxation techniques. Logarithmic stress relaxation was not observed but the data could be treated in terms of an analysis of thermally activated deformation by Reed‐Hill and Dahlberg. The room‐temperature activation energy and activation volume of the rate‐controlling deformation mechanism were measured as 25 kcal/mol and 7000 Å 3 , respectively. A dislocation model of the domain processes responsible for deformation, consistent with the experimental data, is presented.