About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
Structure and Phase Characterizations of Refractory High-entropy Alloying Nanoparticles Synthesized Using Femtosecond Laser Ablation |
Author(s) |
Anming Hu, David Fieser, John Whitlow, Peter K. Liaw |
On-Site Speaker (Planned) |
Anming Hu |
Abstract Scope |
The incorporation of multiple immiscible elements into colloidal high-entropy alloy (HEA) nanoparticles continues to be a technical challenge, but it possesses manifold technological potential in emergent applications. In this study, we displayed the successful synthesis of high-entropy alloying nanoparticles through femtosecond laser ablation from refractory high entropy HfxTiZrNbTay alloys (x, y=0,0.5,1). Our results display that the nanoparticles possess the identical composition as the bulk. However, the crystal structure changes from BCC single phase to FCC single phase. We display that this structure change depends on different solvents when ablating in liquid. The surface contamination of carbon and oxygen is evident. However, this surface contamination can be avoided when ablated in inert gas or vacuum. The possible structure variation due to lattice stress releasing is examined by various microstructure and spectroscopic tools. The potential applications of these refractory HEA nanoparticles for brazing and catalysis are also investigated. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, |