About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
In-situ TEM Annealing Reveals Oxide-metal Interface is Initiation Site for Phase Transformation in TiO2 Nanotubes |
Author(s) |
Jerry R. Howard, Hammad Malik, Brian Van Devener, Swomitra Mohanty, Krista Carlson |
On-Site Speaker (Planned) |
Jerry R. Howard |
Abstract Scope |
Anodically grown titanium oxide nanotubes (NTs) are of great research interest due to their unique physiochemical properties. For many applications, however, heat treatment is required to impart the NTs with a useful crystalline structure. The exact processes which occur in NTs during heat treatment, including the anatase to rutile transition (ART), have not been reported on. Previous studies have largely made use of conventional materials characterization techniques; analyzing bulk samples after annealing has completed. In this study, an in-situ transmission electron microscopy technique was used to observe the morphological and phase changes occurring at the oxide-metal interface of titanium oxide NTs during annealing. This analysis required the use of a novel FIB-based lift out technique. The effects of the metal substrate were characterized by preparing samples both with and without the metal substrate present. Through this analysis, the oxide-metal interface is indicated as the initiation site for the ART. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Nanotechnology, Titanium |