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
收藏
页码：6637 / 6644
页数：8
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