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Meeting MS&T22: Materials Science & Technology
Symposium Dislocations in Ceramics: Processing, Structure, Mechanics, and Functionality
Presentation Title Charged Dislocations in Ionic Ceramics: Equilibrium and Kinetics
Author(s) Edwin Garcia, Vikrant Karra
On-Site Speaker (Planned) Edwin Garcia
Abstract Scope The multifuncional properties of ionic ceramics have led to a great deal of applications ranging from memories, materials with runnable and switchable electrical conductivity, sensors and actuators, to technologies for energy storage and conversion applications. The possibilities seem endless, only limited by their processing, formability, and structural integrity. At its core, the presence of defects, including grain boundaries, dislocations, vacancies, and insterstitials has a central role on delivering tailored properties. In this paper, a thermodynamics-based variational formulation will be presented to rationalize the effects of electrical charge, stresses, and thermochemistry (including its couplings) and their effect on the stability and time-dependent behavior of dislocations in ionic ceramics. Applications to Yttria Stabilized Zirconia will be presented, highlighting the electro-chemo-mechanical interactions of point defects on the vicinity of the dislocation core and its impact on the observed non-elastic behavior. Comparisons against experiments will be made.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Atomistic and Multiscale Computational Analysis of the Connection between Dislocation Slip and Ionic Transport in Plastically Deformed Oxides
Charged Dislocations in Ionic Ceramics: Equilibrium and Kinetics
Conceptual Framework for Dislocation Mechanics in Ceramics
Dislocation-Modified Photoelectric Properties of Oxide Ceramics
Effects of Light Illumination on the Dislocation-mediated Plasticity in Single-crystalline ZnO
In Situ Observation of Fracture Dominated by a Single Dislocation and Its Governing Mechanics
Understanding and Engineering Dislocations in Oxides at Room Temperature

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