About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on High Entropy Alloys (HEA 2026)
|
| Presentation Title |
Thickness-Dependent High-Entropy-Alloy Nanoparticle Formation via Pulsed Laser-Induced Dewetting |
| Author(s) |
Nagarajan Anna Ramesh Babu, Ritesh Sachan, Vikas Reddy Paduri, Ramji Subedi, Manuel Roldan Gutierrez, Nozomi Shirato |
| On-Site Speaker (Planned) |
Nagarajan Anna Ramesh Babu |
| Abstract Scope |
We present a systematic study to investigate the formation of compositionally homogeneous NiCoCrFeCu High-entropy alloy nanoparticles (HEA NPs), using nanosecond laser induced dewetting of alloy films. Dewetting of metallic thin films enables nanoparticle formation via melt-state breakup of thin films followed by material accumulation in nanoscale droplet shapes through surface gradients and capillary instabilities. The studies on thickness-dependent dewetting behavior of films (3-30 nm) reveal its dominant role over determining the characteristic length scales of nanoparticles, namely nanoparticle diameter and interparticle spacing while laser parameters such as fluence and irradiated count primarily govern the kinetics of pattern evolution. Unlike well-studied monometallic systems, where the dewetting length scales increases quadratically with film thickness (λ∝ h²) in agreement with thin-film hydrodynamic theory, this HEA system exhibit a near-linear dependence, indicating significant deviation from classical instability behaviour. |
| Proceedings Inclusion? |
Undecided |