Mechanism of FCC structure formation in NiCoFeCuMn equiatomic high-entropy alloys

被引：6

作者：

Tang, Chenghuang ^{[1
,2
]}

Ye, Haimei ^{[1
,2
]}

Zhan, Yongzhong ^{[1
,2
]}

机构：

[1] Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Guangxi, Peoples R China

[2] Guangxi Univ, Guangxi Key Lab Proc Nonferrous Met & Featured Me, Nanning 530004, Guangxi, Peoples R China

来源：

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING | 2019年 / 44卷 / 07期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

High-entropy alloys; Interaction energy; Solid solution; Thermodynamics; SOLID-SOLUTION PHASE; MICROSTRUCTURE; STABILITY; HARDNESS; RESISTANCE; EVOLUTION; CRITERIA; FILMS;

D O I：

10.1007/s13369-019-03875-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Microstructural formation mechanism of NiCoFeCuMn equiatomic high-entropy alloys has been discussed from a viewpoint of interaction energy. It is indicated that when the interaction energy (I-ij) is higher than a threshold value (I-t), spinodal decomposition may occur, leading to segregation of similar atoms and formation of a phase independently. Segregation of similar atoms is prone to appear in the alloys containing Fe-Cu or Cu-Cr components. However, when it is I-ij<I-t, heterogeneous atoms segregation may appear. Components like Mn-Ni, Mn-Cu and Mn-Co et al. in the NiCoFeCuMn alloy prone to segregate. For the equiatomic HEAs, interaction energy I-ij can effectively reflect the formation mechanism of single-FCC crystal structure and is a principle criterion for material design.

引用

页码：6637 / 6644

页数：8

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