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Transformational Plasticity in Bi 2 O 3
Author(s) -
JOHNSON C. A.,
BRADT R. C.,
HOKE J. H.
Publication year - 1975
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.1151-2916.1975.tb18978.x
Subject(s) - plasticity , materials science , creep , grain boundary , ceramic , monoclinic crystal system , transformational leadership , crystallography , metallurgy , composite material , thermodynamics , mineralogy , microstructure , chemistry , crystal structure , physics , psychology , social psychology
Transformational plasticity associated with the monoclinic‐to‐cubic phase transition at 730°C in Bi 2 O 3 was observed and characterized. This phenomenon is explained in terms of Greenwood and Johnson's model of internal stress‐induced deformation, proceeding, in this instance, by a time‐dependent, grain‐size‐sensitive creep mechanism, probably grain‐boundary sliding. Criteria are proposed for choosing other prospective transformationally plastic ceramics; they are met by Bi 2 WO 6 , which also exhibits extensive transformation plasticity.