Rheology of Earth Materials :

Closing the gap between timescales in the laboratory and in the mantle

19 January 2021 – Invited presentation of P. Cordier at Electronic Materials and Applications 2021

Electronic Materials and Applications 2021 (EMA 2021) is an international conference focused on electroceramic materials and their applications in electronic, electrochemical, electromechanical, magnetic, dielectric, biological and optical components, devices, and systems. Jointly programmed by the Electronics Division and Basic Science Division of The American Ceramic Society, EMA 2021 will be a virtual event on the same planned dates, January 19–22, 2021.


The conference program features 15 symposia covering a range of focused topics.

We participate in symposium 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.


The Symposium organizers are:

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



Tueesday, January 19 

1:00pm - 1:30pm (Eastern)

Xinghang Zhang (Purdue University) In situ studies on mechanical behavior of flash-sintered TiO2

1:30pm - 2:00pm (Eastern) - 7:30pm - 8:00pm (Paris Time)

Patrick Cordier (University of Lille) On the importance of dislocation climb to deform minerals in the Earth - Invited

2:00pm - 2:30pm (Eastern)

Eita Tochigi (The University of Tokyo) Atomic structure analysis of dissociated dislocations in alumina - Invited

2:30pm - 2:45pm (Eastern)

Kuan Ding (Technische Universität Darmstadt ) Nanoscale to microscale reversal in room-temperature plasticity in SrTiO3 by defect chemistry engineering