Structural and magnetic transitions of CoFeMnNiAl high-entropy alloys caused by composition and annealing

Tingting Zuo; Yongqiang Cheng; Peiyong Chen; Zhaoshun Gao; Yong Zhang; Peter K. Liaw

doi:10.1016/j.intermet.2021.107298

Structural and magnetic transitions of CoFeMnNiAl high-entropy alloys caused by composition and annealing

Tingting Zuo, Yongqiang Cheng, Peiyong Chen, Zhaoshun Gao, Yong Zhang, Peter K. Liaw

Chemical Spectroscopy

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Tailoring magnetic behavior by composition and annealing is an effective way. The phase transition from the face-centered-cubic (FCC) to B2 structure influenced by the Al content on the CoFeMnNiAl_x alloys leads to the enhanced magnetization. However, the excessive Al addition in the B2-structured alloys impairs the magnetization. The phase transformation caused by annealing also indicates that the saturation magnetization of the alloy depends on the volume fraction of the B2 phase, and a higher content of the B2 phase is beneficial to the large saturation magnetization. Ab initio calculations are used to explain the magnetic behavior of the present HEAs and the effects of phase structures on magnetic characteristics. The phase stability of the CoFeMnNiAl_x alloy is thoroughly studied by both the existing phase-formation empirical criteria and annealing. The existing empirical criteria used to predict the phase formation are not universal. However, combining the ΔH_mix-δ relation and the φ value, whether the single disordered solid-solution phase is formed can be preliminarily predicted.

Original language	English
Article number	107298
Journal	Intermetallics
Volume	137
DOIs	https://doi.org/10.1016/j.intermet.2021.107298
State	Published - Oct 2021

Funding

The present work is supported by the National Natural Science Foundation of China (grant number 51901221 ). P. K. Liaw very much appreciates the supports from (1) the National Science Foundation (DMR- 1611180 and 1809640 ) with program directors, Drs. J. Yang, G. Shiflet, and D. Farkas and (2) the US Army Research Office (W911NF-13–1-0438 and W911NF-19–2-0049) with program managers, Drs. M.P. Bakas, S.N. Mathaudhu, and D.M. Stepp. Y.Q. Cheng was supported in part by the US Department of Energy, Office of Basic Energy Sciences, Division of Scientific User Facilities . The computing resources were made available through the VirtuES project, funded by the Laboratory Directed Research and Development program and Compute and Data Environment for Science (CADES) at ORNL .

Funders	Funder number
Compute and Data Environment for Science
National Science Foundation	DMR- 1611180, 1809640
U.S. Department of Energy
Army Research Office	W911NF-13–1-0438, W911NF-19–2-0049
Basic Energy Sciences
Laboratory Directed Research and Development
National Natural Science Foundation of China	51901221

Keywords

Ab initio calculation
Annealing
High-entropy alloy
Magnetic property
Phase structure

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10.1016/j.intermet.2021.107298

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title = "Structural and magnetic transitions of CoFeMnNiAl high-entropy alloys caused by composition and annealing",

abstract = "Tailoring magnetic behavior by composition and annealing is an effective way. The phase transition from the face-centered-cubic (FCC) to B2 structure influenced by the Al content on the CoFeMnNiAlx alloys leads to the enhanced magnetization. However, the excessive Al addition in the B2-structured alloys impairs the magnetization. The phase transformation caused by annealing also indicates that the saturation magnetization of the alloy depends on the volume fraction of the B2 phase, and a higher content of the B2 phase is beneficial to the large saturation magnetization. Ab initio calculations are used to explain the magnetic behavior of the present HEAs and the effects of phase structures on magnetic characteristics. The phase stability of the CoFeMnNiAlx alloy is thoroughly studied by both the existing phase-formation empirical criteria and annealing. The existing empirical criteria used to predict the phase formation are not universal. However, combining the ΔHmix-δ relation and the φ value, whether the single disordered solid-solution phase is formed can be preliminarily predicted.",

keywords = "Ab initio calculation, Annealing, High-entropy alloy, Magnetic property, Phase structure",

author = "Tingting Zuo and Yongqiang Cheng and Peiyong Chen and Zhaoshun Gao and Yong Zhang and Liaw, {Peter K.}",

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doi = "10.1016/j.intermet.2021.107298",

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T1 - Structural and magnetic transitions of CoFeMnNiAl high-entropy alloys caused by composition and annealing

AU - Zuo, Tingting

AU - Cheng, Yongqiang

AU - Chen, Peiyong

AU - Gao, Zhaoshun

AU - Zhang, Yong

AU - Liaw, Peter K.

PY - 2021/10

Y1 - 2021/10

N2 - Tailoring magnetic behavior by composition and annealing is an effective way. The phase transition from the face-centered-cubic (FCC) to B2 structure influenced by the Al content on the CoFeMnNiAlx alloys leads to the enhanced magnetization. However, the excessive Al addition in the B2-structured alloys impairs the magnetization. The phase transformation caused by annealing also indicates that the saturation magnetization of the alloy depends on the volume fraction of the B2 phase, and a higher content of the B2 phase is beneficial to the large saturation magnetization. Ab initio calculations are used to explain the magnetic behavior of the present HEAs and the effects of phase structures on magnetic characteristics. The phase stability of the CoFeMnNiAlx alloy is thoroughly studied by both the existing phase-formation empirical criteria and annealing. The existing empirical criteria used to predict the phase formation are not universal. However, combining the ΔHmix-δ relation and the φ value, whether the single disordered solid-solution phase is formed can be preliminarily predicted.

AB - Tailoring magnetic behavior by composition and annealing is an effective way. The phase transition from the face-centered-cubic (FCC) to B2 structure influenced by the Al content on the CoFeMnNiAlx alloys leads to the enhanced magnetization. However, the excessive Al addition in the B2-structured alloys impairs the magnetization. The phase transformation caused by annealing also indicates that the saturation magnetization of the alloy depends on the volume fraction of the B2 phase, and a higher content of the B2 phase is beneficial to the large saturation magnetization. Ab initio calculations are used to explain the magnetic behavior of the present HEAs and the effects of phase structures on magnetic characteristics. The phase stability of the CoFeMnNiAlx alloy is thoroughly studied by both the existing phase-formation empirical criteria and annealing. The existing empirical criteria used to predict the phase formation are not universal. However, combining the ΔHmix-δ relation and the φ value, whether the single disordered solid-solution phase is formed can be preliminarily predicted.

KW - Ab initio calculation

KW - Annealing

KW - High-entropy alloy

KW - Magnetic property

KW - Phase structure

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JO - Intermetallics

JF - Intermetallics

M1 - 107298

ER -

Structural and magnetic transitions of CoFeMnNiAl high-entropy alloys caused by composition and annealing

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