High-Entropy Alloys

High-entropy alloys are usually defined as metallic materials with high entropy of mixing at their disordered state. They tend to form high-entropy disordered solid solutions and amorphous phases and get simpler microstructure. High-entropy alloys can include disordered solid solution alloys and high-entropy metallic glasses. In addition, highentropy ceramics based on the same "high entropy" concept can include carbides, nitrides, borides, and oxides. Recent advances in high-entropy alloys and ceramics have brought new conceptions to develop advanced materials, which may potentially overcome the challenges in increasing the property limits for the advanced energy and environment friendly materials. Knowledge and understanding of these high-entropy alloys and ceramics have led to the usage of novel tools for more detailed study such as serration and crackling noise detection, high energy X-rays synchrotron, neutron diffraction, focus ion beam (FIB), 3-dimensional atomic probe tomography (3D APT), density functional theory modeling (DFT), CALPHAD, and ab initio molecular dynamics (AIMD) modeling.