Nanostructured high-entropy materials

Abstract

Abstract

High-entropy ceramics: Present status, challenges, and a look forward

“…From Eq. (4.5), a pronounced strengthening and hardening are anticipated [167]. Similar to HEAs, strengthening and hardening have been widely observed in HECs.…”

“…Lattice distortion has widely been used to reduce the electrical contribution to the thermal conductivity, thus for highly conductive ceramics like borides and carbides, electron scattering can be exacerbated resulting in reduced electrical conductivity in high-entropy borides and carbides [167]. Although [96].…”

“…High-entropy rare earth silicates have been proven to have good thermal stability without phase transformation [88,89]; however, if decomposition can be restricted during air plasma spray needs to be tested. On the other hand, the tunable thermal expansion coefficient has been recognized as one of the main characteristics of HECs [167]. However, strong anisotropy in high-entropy rare earth monoslicate may induce cracking in coating; thus more efforts need to be devoted to either reduce the anisotropy in thermal expansion coefficient or develop a novel method to precisely control the preferred orientation of the rare earth silicate coatings [85].…”

High‐Entropy Metal–Organic Frameworks for Highly Reversible Sodium Storage

“…In recent times, the introduction of high entropy into various materials for different applications has sparked increasing interest among researchers and promoted the rapid development of a series of single-phase multicomponent (equimolar) materials. [1][2][3][4] In disordered multicomponent systems, large configurational entropy is commonly considered to stabilize the crystal structure, transmitting the high-entropy (HE) effects, namely, entropy-driven stabilization and the associated "cocktail" effects arising from cation mixing, and fostering their chemical and structural diversity. [1,4,5] Within the past few years, a large number of high-entropy materials (HEMs), represented first by high-entropy alloys (HEAs) [1,[5][6][7][8] and later by highentropy oxides (HEOs), [3,[9][10][11][12][13] have been utilized in a broad range of applications, including environmental protection, electrochemical energy storage, and thermoelectric and catalytic applications.…”

Fast and High‐Throughput Synthesis of Medium‐ and High‐Entropy Alloys Using Radio Frequency Inductively Coupled Plasma

“…Medium‐entropy alloys (MEAs) and high‐entropy alloys (HEAs), sometimes also known as multiprincipal element alloys (MPEAs), are loosely defined as concentrated solid‐solution alloys that are made of three or four (MEAs), or more (HEAs) metallic elements with equimolar or near‐equimolar ratios. [ 1–6 ] As an evolving field of physical metallurgy, MEAs and HEAs have attracted great attention because of their interesting structures [ 3,7–9 ] and many useful properties. [ 10–12 ] The expansive range of such novel alloy systems “offers rich opportunities for the discovery of new alloys of scientific significance and practical benefit.” [ 13 ] However, the identification of new and useful MEAs or HEAs out of a vast compositional space is a daunting task, giving the possibility of over 100 million alloys with three to six elements.…”