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Stoichiometry Effects on the Fracture of TiO 2− x
Author(s) -
MINNEAR W. P.,
BRADT R. C.
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.tb10749.x
Subject(s) - stoichiometry , transgranular fracture , materials science , fracture toughness , cleavage (geology) , intergranular fracture , intergranular corrosion , fracture (geology) , fracture mechanics , composite material , microstructure , metallurgy , chemistry
Fracture characteristics of TiO 2− x were studied as a function of Stoichiometry. With increasing x , the fracture toughness K I e and the fracture surface energy γ f decrease and the amount of transgranular cleavage increases, corresponding to the increased concentration of planar defects within the grains. Increasing nonstoichiometry also shifted the ( K I ‐ V ) diagram to lower K I values, commensurate with the K I e decrease. Water accelerated stress corrosion by promoting intergranular failure during subcritical crack growth.