| Abstract Scope |
Entropy stabilized oxides (ESOs) demonstrate a reversible phase transformation, allowing for tailorable phase heterogeneity. Few studies explore the mechanical properties of ESOs. This poster investigates how the phase state will influence the mechanical behavior of (Co,Cu,Mg,Ni,Zn)O transition metal ESOs (TM-ESOs). Fully-dense bulk TM-ESO samples were prepared by sintering a blend of oxide powders. These samples were heat treated at 700°C for 1 hr, 2 hrs, 4 hrs, and 12 hrs to promote the formation of secondary phases. X-ray diffraction reveals the presence of tenorite and spinel secondary phases after heat treatment, with the concentration of secondary phases increasing with increasing heat treatment time. Scanning electron microscopy was used to examine the morphology of the secondary phases. Indentation experiments showed that the secondary phase concentration influenced the mechanical behavior of TM-ESOs, indicating that the phase transformation can be used to tailor microstructure and mechanical behavior. |