About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
Mechanical and Microstructural Analysis of a Nanocrystalline Supersaturated Solid Solution Cr-Cu Coatings |
Author(s) |
Michael Burtscher, Markus Alfreider, Christina Kainz, Daniel Kiener |
On-Site Speaker (Planned) |
Michael Burtscher |
Abstract Scope |
The Cr-Cu system not only combines high strength and oxidation resistance, it furthermore enables beneficial electric properties and thermal conductivity. Hence, 60/40 and 70/30 at.% Cr-Cu films of this promising material system were fabricated by PVD at room temperature. In both cases, a film thickness of about 2 µm of a supersaturated solid solution was deposited on Si substrates. The microstructures of the nano crystalline alloys were investigated by SEM, STEM and EDX maps, while the mechanical strength and fracture properties were determined by nanoindentation techniques and in-situ notched bending beam experiments. Furthermore, high-temperature XRD experiments under a protective atmosphere unveiled the segregation temperature for both supersaturated solid solutions. To further investigate the segregation kinetics, in-situ TEM annealing experiments were carried out. Hence, this study provides a comprehensive insight into the segregation behavior of supersaturated solid solution Cr-Cu coatings and the related influence on the mechanical properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Thin Films and Interfaces, Nanotechnology |