| 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 |
Flash Sintering Improves the Mechanical Strength of High Entropy Oxides |
| Author(s) |
Shikhar Krishn Jha, Parmanand Tyagi |
| On-Site Speaker (Planned) |
Shikhar Krishn Jha |
| Abstract Scope |
High entropy oxides (HEOs) have multi-cation disordered chemical structure that makes it suitable as anode for battery applications. (Mg0.2Ti0.2Zn0.2Cu0.2Fe0.2)3O4 has spinel structure with outstanding electrochemical performance because of its configurational entropy stabilized structure. However, its cyclability is poor because of its pulverization during charging-discharging cycles. Its mechanical strength can be improved with better densification but sintering at higher temperatures (~1200 °C) results in disintegration into different phases (phase separation). With the help of flash sintering, higher densification could be achieved with phase purity of spinel solid solution. The mechanical strength of flash sintered specimens was found to be higher than that of conventionally sintered specimens of equivalent density, suggesting a better neck formation with flash sintering. The role of current density was investigated on density and mechanical strength since porosity and strength both are important for anode applications. |