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...
The concept of “high-entropy alloys” was first reported in 2004. In the original theory of high-entropy alloys, the high configurational entropy of chemically complex solid solution phases stabilizes them into a single crystalline phase against the formation of thermodynamically competing intermetallics...
Where previously it was believed that the mixing of elements in this way would lead to impractical multi-phase and brittle intermetallic materials, the discovery that single phase solid solutions can be stabilised by their high configurational entropy has opened up a wide new range of useful ...
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...
Extending the concept of high configurational entropy to a wide range of materials such as intermetallics, ceramics, and semiconductors through the isostructural design approach is discussed. Perspectives are offered in designing future high-performance functional materials utilizing the high-entropy concepts...
B22-P-18 * Microstructure evolution of CoCrFeNiCu high entropy composite alloy High entropy alloy (HEA) consists of more than five alloy components with similar atomic percentage. High configurational entropy resulting from the alloy design leads to formation of stable solid solution and high residua...
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 ...
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...