High entropy alloys (HEAs) are multicomponent compounds whose high configurational entropy allows them to solidify into a single phase, with a simple crystal lattice structure. Some HEAs exhibit desirable properties, such as high specific strength, ductility, and corrosion resistance, while challenging ...
Based on the crystallographic features given above, we chose a Ba-rich composition (Ba is 40% and the others are 15% each) aiming to create a polar high-entropy phase. We note that this composition still has a large configurational entropy (≃1.50R; R is the universal gas constant), ...
[139], who fabricated perovskites with a high configurational entropy (≥ 1.5R), used the tolerance factor as a descriptor for the design of HEOs. They considered 12 HEOs with the formulation of (SrBa)(M)O3, calculated the Goldschmidt tolerance factor for all compositions and compared them to...
D. Ma, B. Grabowski, F. Kormann, J. Neugebauer, and D. Raabe: Ab initio thermodynamics of the CoCrFeMnNi high entropy alloy: Importance of entropy contributions beyond the configurational one.Acta Mater.100, 90 (2015). ArticleCASGoogle Scholar S. Huang, E. Holmström, O. Eriksson, an...
High-entropy effect 2. Lattice distortion effect 3. Sluggish diffusion 4. Cocktail effect The high (configurational) entropy effect was initially claimed to be the dominating factor for stabilizing a solid solution compared to other factors like atomic radii and packing density [19] (Hume-Rothery ...
High-entropy oxides (HEO) are a novel material with the unique electrochemical properties, which are stabilized due to the high configurational entropy. In this paper, a high-entropy (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O nanopowder with the sizes of 40–65 nm and a rocksalt structure was synthesized...
The high configurational entropy of these constituent elements stabilizes them into a single crystalline phase, with unique microstructures and adjustable properties. To date, the most frequently researched HEOs, with rock-salt [[5], [6], [7]] or fluorite structure [8], have shown interesting ...
High entropy alloys represent a unique class of metal alloys, comprising nominally five or more elements in near equiatomic proportions. High entropy alloys have gained significant interest on the basis that the high configurational entropy of such alloy systems is purported to result in a single-pha...
we determined the characteristic time of the CPT by measuring the decay rate of the exothermic peak. As illustrated in Supplementary Fig.13, the kinetic time scale of CPT is relatively larger compared to that of conventional PTs10, suggesting that high configurational entropy slows down the kinetic...
The molar configurational entropy of mixing is given by equation (3). Similarly, the mixing enthalpy may be calculated by summing the nearest- neighbour pairs, such that DHmix ¼ 4 Xn i¼1;i 6¼ j Oijxið1 þ ZiÞxj 1 À Zj ; ð17Þ where Oij is the binary ...