About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXVI
|
| Presentation Title |
Diffusion Investigation in Cu-Co System |
| Author(s) |
Cameron Drewes, Nicolas Ayers, Henri Baldino, Shayndel Pido, Yongho Sohn |
| On-Site Speaker (Planned) |
Cameron Drewes |
| Abstract Scope |
The Cu-Co binary system is of interest for radio frequency (RF) interconnect applications owing to ferromagnetic Co that can dramatically reduce skin depth and increase RF losses. Reliable lifetime prediction requires quantitative understanding of atomic transport across the significant miscibility gap that characterizes this system. In this study, bulk interdiffusion kinetics in the Cu-Co system were investigated using solid-to-solid diffusion couples annealed at 1100, 1200, and 1300 K. Microstructural evolution and composition profiles across the interdiffusion zones were characterized by scanning electron microscopy and X-ray energy-dispersive spectroscopy. Interdiffusion coefficients were extracted via the Boltzmann-Matano and the Sauer-Freise methods, and intrinsic diffusion coefficients were determined using the Heuer method. The composition and temperature dependences of the diffusion coefficients were analyzed. The bulk diffusion coefficients determined would enable computational extrapolation to lower application temperatures, providing a critical baseline for predicting grain-boundary-driven electro/thermomigration failures in RF interconnects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Electronic Materials, Characterization, Copper / Nickel / Cobalt |