On the thermal and mechanical properties of Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O across the high-entropy to entropy-stabilized transition

As various property studies continue to emerge on high entropy and entropy-stabilized ceramics, we seek a further understanding of the property changes across the phase boundary between “high-entropy” and “entropy-stabilized” phases. The thermal and mechanical properties of bulk ceramic entropy stab...

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Veröffentlicht in:APL materials 2022-12, Vol.10 (12), p.121108-121108-6
Hauptverfasser: Rost, Christina M., Schmuckler, Daniel L., Bumgardner, Clifton, Bin Hoque, Md Shafkat, Diercks, David R., Gaskins, John T., Maria, Jon-Paul, Brennecka, Geoffrey L., Li, Xiadong, Hopkins, Patrick E.
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Sprache:eng
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Zusammenfassung:As various property studies continue to emerge on high entropy and entropy-stabilized ceramics, we seek a further understanding of the property changes across the phase boundary between “high-entropy” and “entropy-stabilized” phases. The thermal and mechanical properties of bulk ceramic entropy stabilized oxide composition Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O are investigated across this critical transition temperature via the transient plane-source method, temperature-dependent x-ray diffraction, and nano-indentation. The thermal conductivity remains constant within uncertainty across the multi-to-single phase transition at a value of ≈2.5 W/mK, while the linear coefficient of thermal expansion increases nearly 24% from 10.8 to 14.1 × 10−6 K−1. Mechanical softening is also observed across the transition.
ISSN:2166-532X
2166-532X
DOI:10.1063/5.0122775