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Meeting Materials Science & Technology 2020
Symposium Grain Boundaries, Interfaces, and Surfaces in Functional Materials: Fundamental Structure-Property-Performance Relationships
Presentation Title Equilibrium and Kinetic Shapes of Grains in Polycrystals
Author(s) Wolfgang Rheinheimer, John E. Blendell, Carol A. Handwerker
On-Site Speaker (Planned) Wolfgang Rheinheimer
Abstract Scope We present a suite of measurements and combined analyses of grain growth of large, oriented single crystals into polycrystals. The growth distance, its standard deviation and the microstructure evolution along the single crystal-matrix interface are used to characterize the migration behavior as a function of temperature, time, and interface orientation. The relative grain boundary mobility was determined between 1250 C and 1600 C for the four most important orientations {100}, {110}, {111} and {310}. The conclusions are that the kinetic shapes observed in the microstructures are dominated by the growing side of the interface and not by the dissolving side. The implications for grain growth underscore the applicability of crystal growth models to grain growth in polycrystals. In particular, in strontium titanate, the anisotropy of the grain boundary mobility is reduced from five macroscopic parameters to two easing the incorporation of growth rate anisotropy in simulations of microstructure evolution.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Survey of Constrained Grain Boundary Migration Mechanisms
Advanced TEM of Interfaces and Defects in Functional Ceramics
Anisotropy at Interfaces in Rare-earth Pyrosilicates for High-temperature Coatings
Effect of Electrode Composition and Potential on Moisture Incorporation and Degradation in Dielectrics and Piezoelectrics
Electromigration-induced Defects' Evolution in Polycrystalline Interconnects: Insights from Phase-field Simulations
Equilibrium and Kinetic Shapes of Grains in Polycrystals
Grain Boundary Engineering ZnAl2O4 via Rare Earth (RE) Doping with Varying Ionic Radii
Implications of Ferroelectricity in Perovskite Solar Cells
Phase Stability of Sr1-xBaxMnO3 (0 ≤ x ≤ 0.5) Films Using Combinatorial Substrate Epitaxy
Relating Grain Size Distributions and Grain Boundary Excess Coverages to Complexion Transitions in Eu-doped MgAl2O4
The Impact of Metastable Grain Boundary States on Mobility in FCC Metal
Thermal Property of Diamond Thin Film on Si (100) Substrate
Vacancy-enhanced Grain Boundary Migration

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