Premium
Strength‐Grain Size Relations in Polycrystalline Ceramics
Author(s) -
SINGH J. P.,
VIRKAR ANIL V.,
SHETTY D. K.,
GORDOW R. S.
Publication year - 1979
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.1151-2916.1979.tb19049.x
Subject(s) - materials science , microstructure , grain size , ceramic , crystallite , composite material , metallurgy
A model is presented to explain the strength‐grain size behavior of ceramics exhibiting duplex microstructures and of ceramics with uniform coarse‐grained microstructures. Using an energy balance analysis, the model shows that in most ceramics an hitiipl flaw contained within a single large grain will initially propagate and then arrest after entering the region of increased fracture‐surface energy. The arrested flaw will subsequently propagate to failure at the value OF the critical stress intensity factor. Using the data in the literature, a strength‐(grain size) −1/2 plot for MgAl 2 O 4 was generated.