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The Fracture of Titanium Dioxide Single Crystals with Particular Reference to Non‐Stoichiometry
Author(s) -
Ashbee K. H. G.,
Smallman R. E.
Publication year - 1964
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19640040208
Subject(s) - materials science , stoichiometry , cleavage (geology) , slip (aerodynamics) , rutile , indentation , ductility (earth science) , crystallography , fracture (geology) , composite material , thermodynamics , chemistry , creep , physics , organic chemistry
Rutile (TiO 2 ) single crystals of various degrees of stoichiometry have been compressed at temperatures in the range 600 to 1300 °C; there is no ductility below 600 °C. Cleavage has been observed on (100), (110) and (101) planes, the exact mode of fracture being dependent on orientation and composition. These failures have been interpreted in terms of the known deformation mechanisms. There is a strong temperature dependence of the fracture strain, non‐stoichiometric specimens showing a ductility minimum at about 1000 °C. These features are discussed in terms of the temperature variation of the yield stress. Indentation rests at temperatures as low as −196°C produce cleavage and slip, the crystallographic relationships between which suggest that at least some of the cracks precede the slip.