| About this Abstract |
| 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 |
Stressing Surfaces and Interfaces to Change Microstructure |
| Author(s) |
Klaus van Benthem |
| On-Site Speaker (Planned) |
Klaus van Benthem |
| Abstract Scope |
Exerting external electrical or chemical stress on surfaces or interfaces will change surface and interface energies, respectively, which impact microstructure. Electric field assisted sintering has demonstrated the feasibility to accelerate densification of powder compacts, lower processing temperatures, and suppress or enhance grain growth. In this presentation a series of recent bicrystal diffusion bonding experiments will be reviewed that were designed to systematically elucidate electric field effects on the atomic and electronic structures of individual grain boundaries. Electric field direction relative to the grain boundary plane will be discussed. 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. Potential growth modes are discussed. This work was financially supported by the National Science Foundation under award DMR-1836571. |