Review of high entropy ceramics: design, synthesis, structure and properties
High entropy ceramics are novel materials with no less than four different cations or anions. The development of high entropy ceramics follows the 'configurational entropy stabilized single phase' concept, which was first demonstrated for high entropy metal alloys in 2004. The advantages o...
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| Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 7; no. 39; pp. 22148 - 22162 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
Cambridge
Royal Society of Chemistry
2019
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| Subjects | |
| Online Access | Get full text |
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| Summary: | High entropy ceramics are novel materials with no less than four different cations or anions. The development of high entropy ceramics follows the 'configurational entropy stabilized single phase' concept, which was first demonstrated for high entropy metal alloys in 2004. The advantages of high entropy ceramics are their compositional and structural diversity, and many of them have a band gap, which makes them potential functional materials for a wide range of applications. They have recently generated significant interest with the publication of 70+ related papers since 2015. In this review we have summarized the recent progress in this rapidly growing field. We emphasize the progress by researchers to answer the following three fundamental questions for high entropy ceramics: (1) which combinations of cations or anions can be synthesized as single-phase materials; (2) are the component elements truly random down to the atomic scale; and (3) what new physics, properties and applications will the incorporation of multi-elements elements bring. These fundamental questions are still open at this stage and warrant further studies. The objective of this review is to give a comprehensive overview of the literature to date on high entropy ceramics and to guide further investigation in this emerging field.
Design models, synthesis methods, atomic scale structure characterization, properties and applications of high entropy ceramics are reviewed. |
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| Bibliography: | Michael J. Reece's research group is currently focused on the development of field (electric, magnetic and gravity) assisted processing to produce nanostructured, textured, hierarchical and non-equilibrium functional ceramics, including thermoelectrics and high entropy ceramics. This includes the recently established MagMat facility for the synthesis and processing of materials in strong magnetic fields (15T). A longterm objective of his work is to commercialise materials prepared by field assisted processing through knowledge transfer and spin-outs. He is a Director of Nanoforce Technology Ltd, a spin-out company of QMUL. Nanoforce focuses on the development of new, scalable processing routes for nanomaterials that can be commercialised. Rui-Zhi Zhang received a Ph.D. in condensed matter physics in 2010 from Shandong University in China. After completing Ph.D. he worked in Northwest University in Xi'an, China as an associate professor. In 2014, he held the position of Marie Curie Research Fellow under the guidance of Prof Michael J. Reece at Queen Mary University of London. His research interests include data-driven ceramics design utilizing density functional theory and deep neural networks, and spark plasma sintering of thermoelectric ceramics and high entropy ceramics. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 |
| ISSN: | 2050-7488 2050-7496 2050-7496 |
| DOI: | 10.1039/c9ta05698j |