title: Plasticity and an inverse brittle-to-ductile transition in strontium titanate.
abstract: The use of ceramic materials is often restricted by a transition from ductile behavior to brittle fracture with decreasing temperature. For example, strontium titanate ( SrTiO3) is known to be extremely fragile and brittle below 1300 K. It is therefore surprising to find that SrTiO3 single crystals can be deformed in compression below 1050 K again. Extensive plastic deformation up to 7% strain at low yield stresses of the order of only 120 MPa is possible at room temperature. Low temperature plasticity is carried by the same [110] [110] dislocations as the high temperature deformation along the [001] axis. From this we conclude that these dislocations must exist in two different core configurations.
authors.affiliation: Max-Planck-Institut für Metallforschung, Seestrasse 92, 70174 Stuttgart, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Gumbsch
authors.forename: S
authors.initials: S
authors.lastname: Taeri-Baghbadrani
authors.forename: D
authors.initials: D
authors.lastname: Brunner
authors.forename: W
authors.initials: W
authors.lastname: Sigle
authors.forename: M
authors.initials: M
authors.lastname: Rühle