On the thermal and mechanical properties of Mg_0.2Co_0.2Ni_0.2Cu_0.2Zn_0.2O 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 changes across phase boundary between “high-entropy” “entropy-stabilized” phases. The thermal mechanical properties bulk ceramic stabilized oxide composition Mg 0.2 Co Ni Cu Zn O are investigated this critical transition temperature via transient plane-source method, temperature-dependent x-ray diffraction, nano-indentation. conductivity remains constant within uncertainty multi-to-single at value ?2.5 W/mK, while linear coefficient expansion increases nearly 24% from 10.8 14.1 × 10 ?6 K ?1 . Mechanical softening is also observed transition.