| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
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| Presentation Title |
Stressing Grain Boundaries to Change Local Properties |
| Author(s) |
William D Hahn, Andrew R Lupini, Klaus van Benthem |
| On-Site Speaker (Planned) |
Klaus van Benthem |
| Abstract Scope |
Atomic-scale defect configurations determine the properties and functionalities of materials. The application of stress fields such as elevated temperature, modified gas phases, or externally applied electric fields may alter grain boundary structures and cause modification of macroscopic physical properties. In this talk I will review recent experiments on electric field induced modification of 24o tilt grain boundaries SrTiO3. Aberration-corrected scanning transmission electron microscopy experiments revealed changes in the atomic interface structures, local bonding configurations, and interfacial physical density. Electron energy-loss spectroscopy experiments were carried out to explore field-induced changes of the local complex dielectric function that would result in modified local optical properties. Parts of the electron microscopy characterization was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. |