| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spatially Tailored Materials: Processing-Structure-Properties
|
| Presentation Title |
Combinatorial high throughput study of the interplay between microstructure and mechanical properties in Ni-Al thin films |
| Author(s) |
Nicolas J. Peter, Peter Nellessen, Adie Alwen, Andrea M. Hodge, Ruth Schwaiger |
| On-Site Speaker (Planned) |
Nicolas J. Peter |
| Abstract Scope |
Intermetallic phases in the Ni-Al binary phase diagram, especially B2-NiAl possess many desirable properties, e.g., high melting temperature and high hardness, all at low density. In order to identify compositions that allow for low density materials with high hardness, we explored the microstructure, composition and hardness space of Ni-Al thin films having 47 different compositions. Magnetron co-sputtered films were investigated by X-ray diffraction, energy dispersive X-ray spectroscopy, advanced (4D) scanning transmission electron microscopy and nanoindentation to correlate the obtained microstructures and phase compositions with the films’ respective mechanical properties. Increasing Al content ranging from 27 at.% to 56 at.% revealed a transition from a nanocrystalline A1-structured film to a film with two-phase microstructure consisting of an ordered phase, i.e., B2, and an A1 phase. This two-phase microstructure retained a hardness of ~8 GPa. Based on our findings, we introduce a predictive hardness model and discuss the relevant strengthening mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Characterization, Mechanical Properties |