| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-33: Prospects of Refractory Ti-V-Zr-Nb-Mo-Hf-Ta-W High-Entropy Alloys in Hydrogen Energy Systems |
| Author(s) |
Marina Ciurans-Oset, Renata Latypova, Sakari Pallaspuro, Johanne Mouzon, Farid Akhtar |
| On-Site Speaker (Planned) |
Marina Ciurans-Oset |
| Abstract Scope |
In the present study, spherical powders of near-equiatomic Ti-V-Zr-Nb-Mo-Hf-Ta-W refractory high-entropy alloys were fabricated by plasma-assisted centrifugal atomization and consolidated into fully-dense specimens by spark plasma sintering. These bulk high-entropy alloys exhibited densities of 10.6-11.4 g/cm3, estimated melting temperatures within the range of 1700-1900 ᵒC, and room-temperature hardness of 7-8 GPa, which is approximately 30 % superior than that of conventional arc-melted and casted refractory high-entropy alloys with similar chemical compositions. This significantly superior hardness was attributed to the retention of the refined microstructure of the spherical powder within the bulk specimens upon spark plasma sintering thanks to short-range-limited diffusional mass transport in the solid-state. In this poster, we want to showcase the most relevant physical and mechanical properties of these refractory high-entropy alloys for hydrogen storage and transport applications. |