| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in High-Temperature Oxidation and Degradation of Materials for Harsh Environments: A SMD and FMD Symposium Honoring Brian Gleeson
|
| Presentation Title |
Atomic Scale Understanding of Cu and Cu Alloy Oxidation Using In Situ Environmental TEM |
| Author(s) |
Judith Yang, Meng Li, Stephen House, Matthew T. Curnan, Linna Qiao, Xiaobo Chen, Dmitri Zakharov, Wissam Saidi, Guangwen Zhou |
| On-Site Speaker (Planned) |
Judith Yang |
| Abstract Scope |
Experimental tools capable of observing in situ the early-stage oxidation at the atomic scale are key to predictive oxidation. We use in situ environmental transmission electron microscopy (ETEM) experiments, with advanced data analysis and correlated theoretical simulations, to investigate the initial stages of Cu and CuNi oxidation. Single-crystalline ~60 nm Cu and CuNi thin films were prepared by ebeam evaporation and then transferred to a dedicated ETEM with a home-built gas delivery system. In situ oxidation experiments were performed around 300°C under O2. The onset of surface reconstruction, nucleation and initial growth of the epitaxial oxides are followed in situ. In-depth analysis of these atomic scale processes is completed via automated ETEM data-processing and statistical techniques. For gaining fundamental understandings, a multiscale theoretical framework is being developed for simulating longer time scales to correlate directly with experimental observations. Mechanistic understanding of the role of surfaces, defects and composition is revealed. |