难熔高熵合金的研究进展-中国材料进展

文章信息/Info

Author(s):: LIU Zhangquan; QIAO Junwei; (Research Center for HighEntropy Alloys, School of Materials Science and Engineering,Taiyuan University of Technology, Taiyuan 030024, China)

Keywords:: high-entropy alloys; refractory alloys; microstructure; mechanical properties; wear resistance; high temperature oxidation resistance

摘要:: 高熵合金是一种不同于传统合金的新型合金，由5种或5种以上的主要元素组成，每种元素的原子数分数在5%~35%之间。其中基于难熔元素的难熔高熵合金以其优异的高温性能引起了人们的广泛关注。难熔元素是指熔点高于1800 ℃并有一定储量的金属，金属钨是其中典型的代表。难熔高熵合金的定义进一步延伸为含有3种或3种以上主要元素且元素的原子数分数可大于35%后，得到了更加迅速的发展。首先介绍了难熔高熵合金的制备方法、微观结构和相组成；阐述了难熔高熵合金室温和高温力学性能、主要的强化机制、耐磨性及高温抗氧化性；最后讨论了难熔高熵合金面临的挑战和潜在的应用。

Abstract:: Being different from traditional alloys, high-entropy alloys are composed of five or more principal elements. Moreover, the concentration of each element is between 5at% and 35at%. Due to their excellent high-temperature performance, high-entropy alloys attract the interest of many researchers. Refractory elements are metals with a melting point above 1800 ℃ and a certain amount of reserves, represented by tungsten. Subsequently, After their principal elements can be three or more kinds and the concentration of each element can be more than 35at%, refractory highentropy alloys have achieved rapid development. The preparation methods, microstructure, and phase composition of refractory high-entropy alloys were introduced. The properties of refractory high-entropy alloys were described, including room-temperature and high-temperature mechanical properties, main strengthening mechanisms, wearresistant performance and high-temperature oxidation resistance. Finally, the challenges and potential applications of refractory high-entropy alloys were discussed in detail.