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Breakthrough applications of high-entropy materials

Published online by Cambridge University Press:  20 August 2018

Jien-Wei Yeh  and
Su-Jien Lin
Jien-Wei Yeh*
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China
Su-Jien Lin
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China
*
a)Address all correspondence to this author. e-mail: jwyeh@mx.nthu.edu.tw
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Abstract

The concept of high-entropy alloys has been extended to ceramics, polymers, and composites. “High-entropy materials (HEMs)” are named to cover all these materials. Recently, HEMs has become a new emerging field through the collective efforts of many researchers. Basically, high mixing entropy can enhance the formation of solution-type phases for alloys, ceramics, and composites at high temperatures, and in general leads to simpler microstructure. Large degrees of freedom in composition design as well as process design have been found to provide a wide range of microstructure and properties for applications. There are many opportunities for HEMs to overcome the bottlenecks of conventional materials. In this article, several possible breakthrough applications are pointed out and emphasized for turbine blades, thermal spray bond coatings, high-temperature molds and dies, sintered carbides for cutting tools, hard coatings for cutting tools, hardfacings, and radiation-damage resistant materials. In addition, more possible breakthrough examples are briefly described.

Keywords

high-entropy alloyshigh-entropy ceramicshigh-entropy materialsbreakthrough applications
Type
Invited Article
Information
Journal of Materials Research , Volume 33 , Issue 19: Focus Issue: Fundamental Understanding and Applications of High-Entropy Alloys , 14 October 2018 , pp. 3129 - 3137
Copyright
Copyright © Materials Research Society 2018 

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