About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Interdiffusion-driven Phase Growth Kinetics in CoNi/Al and CoCrNi/Al Diffusion Couples |
| Author(s) |
Tamanna Harihar Panigrahi, Bhawna Yadav, Ramya Lakshmi, T.N. Prashanti, C. Sudha, Mayur Vaidya |
| On-Site Speaker (Planned) |
Tamanna Harihar Panigrahi |
| Abstract Scope |
The performance and reliability of materials under extreme conditions are significantly influenced by interdiffusion, where atomic migration at interfaces forms new phases affecting strength and durability. This study examines the phase growth kinetics in CoNi/Al and CoCrNi/Al diffusion couples to understand how compositional complexity impacts phase evolution. Diffusion couples were annealed at 630°C for durations ranging from 48 to 192 hours, and the interdiffusion zones (IDZ) were characterised using SEM, EDS, EPMA, and micro-XRD. Adding chromium to CoNi to form a ternary CoCrNi alloy changes the kinetics of phase growth, promotes the formation of multicomponent intermetallic phases, and leads to the development of a distinct transition zone at longer annealing durations. Insights from this study can be applied to tackle the growth of unwanted phases and optimise phase stability, leading to improved material performance in applications like diffusion bonding, bond coatings, flip-chip technology, and brazing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Joining, Characterization |