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Meeting MS&T21: Materials Science & Technology
Symposium ACerS Robert B. Sosman Award Symposium: Bridging the Gap between Atomistic and Continuum Approaches to Interface Science
Presentation Title Microstructure Evolution in Thin Film Yttria-doped Barium Zirconate
Author(s) Dylan Jennings, Ivar E. Reimanis, Sandrine Ricote, Jose Santiso
On-Site Speaker (Planned) Ivar E. Reimanis
Abstract Scope Microstructure evolution in mixed metal oxides exposed to various redox conditions is important to understand for applications such as catalysis, solid oxide fuel cells, and solar thermal water splitting. The present work examines the behaviors of thin films comprising yttria-doped barium zirconate (BZY), a classical proton conductor, under various environmental conditions. It is shown that the chemical and morphological stability of the films decreases when Ni is added; in contrast, the presence of Fe, either as an impurity or added intentionally, enhances film stability. Exsolution of metallic Ni from solution in the BZY at the film surface readily occurs under reducing conditions. The exsolved particles display a unique crystallographic relationship with the BZY, unlike Ni particles formed via dewetting experiments where several orientations were observed. The Ni/BZY interface energy was determined with a Winterbottom analysis and results are discussed in the context of microstructure evolution and stability of the films.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Atomic Structure of Two Phases of a Cu Tilt Grain Boundary Resolved by Scanning Transmission Electron Microscopy
Charged Interfaces: Equilibrium, Phase Transitions, and Microstructural Evolution
Combining Atomistic and Continuum Approaches Towards Understanding Interfaces
Combining Atomistic to Thermodynamic Modeling with Machine Learning and Advanced Microscopy to Understand General Grain Boundaries and Interfaces
Disconnections, Faceting, Solutes and Their Impact on Grain Boundary Migration in Ceramics
FCC Films on c-sapphire: Why Do Single Elements and High Entropy Alloys Adopt the Same Orientation Relationships?
Formation/Migration of Faceted Boundaries and Grain Growth Behavior in Ni
Grain Boundaries in the Wild
Mechanistic Insights into the Effect of Heating Rate on Sintering and Sintering Stress Evolution
Microstructure Evolution in Thin Film Yttria-doped Barium Zirconate
Stress-Induced Interface Instability in Battery Electrode Materials
Stressing Surfaces and Interfaces to Change Microstructure
Surface Segregation in Multicomponent High Entropy Alloys: A Comparison between Atomistic Simulations and a Simple Analytical Model
Tracing Impurities at Surfaces and Interfaces of Renewable Energy Materials

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