S11 – Dislocations in Ceramics: Processing, Structure, Plasticity, and Functionality

In the field of functional ceramics, the importance of dislocations for materials processing and properties recently gained attention. For example, some oxides were discovered to allow considerable plastic deformation, even at room temperature as, for example, in single-crystalline strontium titanate.

Beyond purely mechanical considerations of plasticity in oxides, particular interest lies in the impact of dislocations on functional properties as, for example, thermal, electronic and ionic conductivity, and ferroelectricity. The foundation of this impact is related to the atomic structure, chemistry, and charge of dislocations in oxides, their percolation, and their response to mechanical, electrical, thermal, and chemical parameters.

Beyond properties, dislocations are considered to be of central importance for processing, for example, in the field of sintering and flash sintering, high-pressure powder processing, and aerosol deposition. These methods offer the potential to engineer materials, phases, and structures with new functionality while overcoming limitations of conventional processing.

This symposium brings together experimentalists and modelers in the field of dislocations in functional materials. While the focus is on functional oxides, many concepts in this field are well established for metals. Accordingly, related contributions from other materials including metals are welcome as well.

Proposed sessions 

• Mechanisms of plasticity in ceramics at low and high temperatures
• Modeling of dislocations, plasticity, and impact on properties
• Room temperature plasticity
• Dislocation and functionality
  • Ionic, electronic, and thermal conductivity
  • Ferroelectricity
• Applications and Techniques
  • Dislocations in ceramic processing and sintering
• Chemical and structural characterization of dislocations
• High pressure torsion
• Aerosol deposition
• Resistive switching and dislocations
• Micromechanical testing and related methods

Symposium organizers 

• Lukas Porz, Technische Universität Darmstadt, Germany, porz@ceramics.tu-darmstadt.de
• Wolfgang Rheinheimer, Technische Universität Darmstadt, Germany, wolfgang.rheinheimer@gmail.com
• Xufei Fang, Technische Universität Darmstadt, Germany, fang@ceramics.tu-darmstadt.de
• Till Frömmling, Technische Universität Darmstadt, Germany, froemling@ceramics.tu-darmstadt.de
• Atsutomo Nakamura, Nagoya University, Japan, anaka@nagoya-u.jp