| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Dependence of 9R Interfacial Phase Formation on Boundary Inclination at Medium Angle Grain Boundaries (MAGBs) in Au |
| Author(s) |
Alejandro Hinojos, Darcey M. Britton, David Adams, Daniel Vizoso, Remi Dingreville, Douglas L Medlin |
| On-Site Speaker (Planned) |
Alejandro Hinojos |
| Abstract Scope |
Misorientation and inclination define the macroscopic character of a grain boundary. In general, these parameters vary independently, but in a bicrystalline geometry it is possible to experimentally fix the misorientation so that inclination can be independently investigated. Here, we analyze twins intersecting boundaries in 90° <101> Au thin film bicrystal. These intersections form medium angle grain boundaries (MAGBs) with a constant misorientation of 19.47° but a varying inclination. Atomic resolution STEM imaging of the MAGBs as a function of inclination reveals two classes of boundary: one that dissociates, forming the 9R phase, and a second that forms a stepped morphology. We explain the dependence of the interfacial phase on inclination through dislocation theory.
Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the US DOE’s NNSA under contract DE-NA-0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Characterization, Phase Transformations |