| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond V
|
| Presentation Title |
Fabrication of Powdered Ti-V-Zr-Nb-Mo-Hf-Ta-W Refractory High-Entropy Alloys by Plasma-Assisted Centrifugal Atomization |
| Author(s) |
Marina Ciurans-Oset, Johanne Mouzon, Farid Akhtar |
| On-Site Speaker (Planned) |
Marina Ciurans-Oset |
| Abstract Scope |
Spherical powders of near-equiatomic Ti-V-Zr-Nb-Mo-Hf-Ta-W refractory high-entropy alloys were fabricated by in-situ alloying during simultaneous melting and atomization of a mix of elemental powders. Low-speed atomization resulted in satellite-free spherical powder with a mono-modal particle size distribution in the range of 250-600 µm, hardness of 6.67±0.61 GPa, and an overall chemical composition within ±1 at.% of the nominal composition. Conversely, high-speed atomization led to an average particle size of 114 µm, hardness of 7.23±0.26 GPa, and significant depletion of Mo, Ta, and W. In all cases, X-ray diffraction revealed the formation of a single body-centered cubic high-entropy phase, as well as the presence of small amounts of Hf oxides and nitrides at the surface of the particles. The rotational speed of the atomizing unit was concluded to have no impact on the high-entropy phase formation and could, therefore, be conveniently adjusted to tailor the particle size distribution of the powders. |