About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
|
Presentation Title |
Material Interdiffusion and Necking between Dissimilar Nanoporous Metal Interfaces |
Author(s) |
Natalya Kublik, Stanislau Niauzorau, Sridhar Niverty, Nikhilesh Chawla, Bruno Azeredo |
On-Site Speaker (Planned) |
Natalya Kublik |
Abstract Scope |
Nanoscale metal welding is a growing research area metal additive manufacturing at the micro and nanoscale as it yields metal sinterability at reduced temperatures. This paper examines the morphology evolution during sintering of nanoporous Cu powders dispersed over nanoporous Au thin films as a model system to understand atomic interdiffusion and necking across their interface at temperatures as low as 44% of their eutectic point. Both powders and thin-films are synthesized by chemical dealloying yielding ligaments that are 46 and 64 nm, respectively and sintered in a H2/Ar atmosphere at 400 °C and its cross-section are taken through their neck zone via focused ion beam milling to examine atomic concentration profiles via energy dispersive X-ray spectroscopy. Large diffusion penetration depths (i.e. 0.8 μm) across the interface are evidenced as well as evidence of neck formation between ligaments bridged across their original contact interface. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nanotechnology, Thin Films and Interfaces, Other |