新型多主元高熵合金的研究进展

Research and Development of the New Multi-principal High Elements Entropy Alloy

多主元高熵合金突破了以1种或2种金属元素为主的传统合金设计理念,是一种具有5种以上主元且每种主元原子分数不超过35%的合金。多主元的混合产生高熵效应,使得高熵合金具有简单的微结构。高熵合金在硬度、耐高温、耐腐蚀以及耐磨损等性能方面表现优良,是具有学术研究价值和工业应用潜力的新型合金,引起了科学界的广泛关注和积极探索。本文重点介绍了高熵合金的定义、组织、性能特点及研究现状,并指出了下一步的研究方向。

High entropy alloys with multi-principal elements are a kind of new alloys with over five principal elements and each element has an atomic percentage more than 35%,which break through the concept of traditional alloy design based on one or two metal elements.High entropy effects arising from the mixture of multi-principal elements promote the forma-tion of simple microstructures in the alloys.High entropy alloys have simple microstructure,and are excellent on hardness,temperature resistance,corrosion resistance and oxidation resistance.As one new emerging area,HE alloys attract more at-tention in science circles and are deserved to be investigated in order to improve academic value and industry application.The definition,microstructure,performance characteristics,the status of research and the researching direction of HE alloys are summarized in this paper.