Tuning the microstructure for superb corrosion resistance in eutectic high entropy alloy

作     者：S.Shuang Q.Yua X.Gao Q.F.He J.Y.Zhang S.Q.Shi Y.Yang S.Shuang;Q.Yu;X.Gao;Q.F.He;J.Y.Zhang;S.Q.Shi;Y.Yang

作者机构：Department of Mechanical EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina Department of Mechanical EngineeringHong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Materials Science and EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第109卷第14期

页      面：197-208页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Research Grant Council(RGC) Hong Kong Government through the General Research Fund(GRF)with the grant number City U11213118 and City U11209317 

主　　题：Eutectic high entropy alloy Passivation Transpassivation potential Microstructure size 

摘      要：In this work,we demonstrate that the corrosion resistance of the FeCrNiCoNb_(0.5) eutectic high entropy alloy(EHEA)can be tuned by controlling the size of its eutectic *** microstructure refinement,the EHEA exhibits a superb corrosion resistance in 1 M NaCl in terms of a very low corrosion current density and an ultra-high transpassviation potential,which outperforms a variety of other HEAs and conventional metals and *** the fundamental level,the microstructure refinement results in a rapid formation of a thick and compact passive film with less Cl-adsorption on the EHEA,which results in significant enhancement in its corrosion *** outcome of our research provides important insights into the design of corrosion resistant chemically complex alloys.