Improvement of corrosion resistance and magnetic properties of FeCoNiAl0.2Si0.2 high entropy alloy via rapid-solidification

被引：55

作者：

Chen, Chen ^{[1
]}

Zhang, Hang ^{[1
]}

Fan, Yanzhou ^{[1
]}

Wei, Ran ^{[1
]}

Zhang, Weiwei ^{[1
]}

Wang, Tan ^{[1
]}

Zhang, Tao ^{[2
]}

Wu, Kang ^{[3
]}

Li, Fushan ^{[1
]}

Guan, Shaokang ^{[1
]}

Jiang, Jianzhong ^{[4
]}

机构：

[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

[2] Beihang Univ, Key Lab Aerosp Mat & Performance, Minist Educ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[3] China Natl Inst Standardizat, Beijing 100191, Peoples R China

[4] Zhejiang Univ, Int Ctr New Struct Mat ICNSM, Lab New Struct Mat, State Key Lab Silicon Mat,Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

INTERMETALLICS | 2020年 / 122卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

High-entropy alloys; Corrosion; Magnetic properties; Rapid solidification; Microstructure; Segregation; PHASE-FORMATION RULES; MECHANICAL-PROPERTIES; AL ADDITION; MICROSTRUCTURE; CO; BEHAVIORS; FE; PRECIPITATION; DECOMPOSITION; STEEL;

D O I：

10.1016/j.intermet.2020.106778

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, a rapid-solidification method was utilized on FeCoNiAl0.2Si0.2 high entropy alloy (HEA) and its effects on microstructure, corrosion resistance and magnetic properties were systematically investigated. Rapid-solidified and slowly-cooled FeCoNiAl0.2Si0.2 specimens were produced by melt-spinning and induction melting, respectively. It was found that, slowly-cooled FeCoNiAl0.2Si0.2 exhibits dendrite structure with compositional segregation of Al, Si and Ni, as well as the precipitation of L1(2)-type ordered phase in the solid solution matrix, while rapid-solidification effectively promotes the structural and compositional homogeneity. Moreover, rapid-solidification leads to significant enhancement in the stability of the passive film, and thus results in remarkable increase in corrosion resistance compared to its slowly-cooled counterpart. Besides, the distribution of constituent elements plays an important role in the formation of passive film on the surface of this HEA. In addition, the H, of the rapid-solidified specimen exhibits only nearly 1/5 of its slowly-cooled counterpart, indicating significant positive effect of rapid-solidification on soft magnetic properties of FeCoNiAl0.2Si0.2. This work provides a novel mute for further development of HEAs with excellent corrosion resistance and soft magnetism.

引用

页数：7

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