Please consider attending the following:
MATERIALS ENGINEERING
“Field Microstructure Evolution of Solid-Solid Interfaces in Ionic Ceramics for Energy Applications”
By
Lucas D. Robinson
Purdue MSE Ph.D. Preliminary Exam
Advisor: Professor Edwin García
ABSTRACT
Interfaces (grain boundaries, phase boundaries, surfaces, etc.) can greatly influence the performance of energy-related materials. Applications where interfaces
play a critical role include solid state batteries and solid oxide fuel cells, electronic materials, metallic vias, and solder bumps that connect different components. These bonded material systems possess equilibrium and kinetic properties that can be attributed
to the underlying interfaces due to the interactions between abutting phases, with dissimilar properties. In this context, understanding the evolution of the heterostructural phases that develop is a key step for the development of advanced devices. In this
work, phase field models for the microstructure evolution of homo- and heterointerfaces are reviewed. Current models in literature are found to be insufficient for modeling phase boundaries in battery materials, and do not fully describe a multiphase, multicomponent
system with charge and polarization effects. A generalized multiphase field theoretical framework is being developed to predict the effects of interfacial space charge, composition, and lattice mismatch on through-thickness transport properties for ceramic
systems. Application of the model for microstructure evolution in metallic systems is discussed as a stepping stone for its use in battery materials.
Date: Friday, November 6, 2018
Time: 11:30 A.M.
Place: ARMS 3115