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1. On the thermal and mechanical properties of Mg 0.2 Co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 O across the high-entropy to entropy-stabilized transition

   https://doi.org/10.1063/5.0122775  

   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. ( December 2022 , APL Materials)

   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 Mg 0.2 Co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 O 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. 

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2. Statistical approach to obtaining vacancy formation energies in high-entropy crystals from first principles calculations: Application to a high-entropy diboride

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   Daigle, S. E. ; Brenner, D. W. ( December 2020 , Physical Review Materials)

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3. On the Entropy Projection and the Robustness of High Order Entropy Stable Discontinuous Galerkin Schemes for Under-Resolved Flows

   https://doi.org/10.3389/fphy.2022.898028  

   Chan, Jesse ; Ranocha, Hendrik ; Rueda-Ramírez, Andrés M. ; Gassner, Gregor ; Warburton, Tim ( July 2022 , Frontiers in Physics)

   High order entropy stable schemes provide improved robustness for computational simulations of fluid flows. However, additional stabilization and positivity preserving limiting can still be required for variable-density flows with under-resolved features. We demonstrate numerically that entropy stable Discontinuous Galerkin (DG) methods which incorporate an “entropy projection” are less likely to require additional limiting to retain positivity for certain types of flows. We conclude by investigating potential explanations for this observed improvement in robustness. 

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4. On discretely entropy conservative and entropy stable discontinuous Galerkin methods

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   https://doi.org/10.1016/j.commatsci.2022.111474  

   Tang, Xiaochuan ; Thompson, Gregory B. ; Ma, Kaka ; Weinberger, Christopher R. ( July 2022 , Computational Materials Science)