Journal of the American Ceramic Society · 2001 · 123 citations · 9 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMechanical Behavior Of MaterialsDislocation MechanicsDislocation TheoryDuctilityFracture MechanicsPlastic DeformationPlasticityBarium Titanate CeramicsBrittle Fracture BehaviorDislocation Theory Of PlasticityDislocation-based PlasticityDuctile-brittle TransitionMicrostructural CharacterizationPlastic Deformation Of CeramicsStrontium Barium Titanate
Oxides such as SrTiO 3 are expected to fail via brittle fracture at low temperatures. Surprisingly, in the present study, SrTiO 3 single crystals could be plastically deformed in compression in two temperature ranges: from 78 K to ∼1050 K and from 1500 K to 1800 K. SrTiO 3 was brittle at temperatures between these two ranges (∼1050–1500 K). This phenomenon of a ductile–brittle–ductile transition, together with microstructural investigations, suggests that the role of dislocations in the plasticity of ceramics must be reconsidered.
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A new self-organizing mechanism for deep-focus earthquakes
H. W. Green, P. C. Burnley · Nature · 1989 · 451 citations