About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
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Presentation Title |
Alteration of Microstructures by Stressing Surfaces and Interfaces |
Author(s) |
Klaus van Benthem |
On-Site Speaker (Planned) |
Klaus van Benthem |
Abstract Scope |
Mechanical, electrical or chemical stress on surfaces or interfaces affects surface and interface energies and can therefore determine microstructure evolution. In this presentation a series of recent bicrystal diffusion bonding experiments will be reviewed that were designed to interrogate electric field effects on the atomic and electronic structures of individual grain boundaries. The results demonstrate the ability to alter grain boundary configurations and, hence, interface energies in an emerging microstructure. In a separate study growth of NiO nanorods from individual Ni nanoparticles was observed during in-situ electron microscopy at high temperature and in the presence of water vapor. High-aspect ratio growth of NiO is favored for sufficiently high total surface energies. In-situ high resolution transmission electron microscopy experiments were used to verify that the terrace-ledge-kink model is also applicable to reactive crystal growth.
This work was financially supported by the US National Science Foundation under award DMR-1836571. |