Experimental determination and thermodynamic assessment of the Dy-Fe-B system

Wei Yang; Yiwei Wang; Shuhong Liu; Peisheng Wang; Wei Zhai

doi:10.1016/j.calphad.2025.102826

Experimental determination and thermodynamic assessment of the Dy-Fe-B system

Wei Yang
, Yiwei Wang
, Shuhong Liu
, Peisheng Wang
, Wei Zhai

School of Physical Science and Technology

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

3 Scopus citations

Abstract

The phase equilibria of the Fe-Dy-B system on the Fe-Dy side are crucial for the development of Nd-Dy-Fe-B permanent magnets. Alloys located on the Fe-Dy side were prepared and annealed at 1073 K and 1173 K for 60 days. The annealed samples were analyzed by electron probe microanalysis (EPMA) and X-ray diffraction (XRD). In this work, three ternary compounds τ₁, τ₃, and τ₄ were identified on the Fe-Dy side at 1073 K and 1173 K. The previously reported τ₂ phase was not observed in the present work. Nine three-phase regions were determined in the present study and the isothermal sections of the Dy-Fe-B system on the Dy-Fe side at 1073 K and 1173 K were constructed. Based on the experimental data, thermodynamic modeling of the system was performed using the CALculation of PHAse Diagrams (CALPHAD) method. The calculated results show good agreement with the experimental data.

Original language	English
Article number	102826
Journal	Calphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume	89
DOIs	https://doi.org/10.1016/j.calphad.2025.102826
State	Published - Jun 2025

Keywords

Compounds
Isothermal sections

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10.1016/j.calphad.2025.102826

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title = "Experimental determination and thermodynamic assessment of the Dy-Fe-B system",

abstract = "The phase equilibria of the Fe-Dy-B system on the Fe-Dy side are crucial for the development of Nd-Dy-Fe-B permanent magnets. Alloys located on the Fe-Dy side were prepared and annealed at 1073 K and 1173 K for 60 days. The annealed samples were analyzed by electron probe microanalysis (EPMA) and X-ray diffraction (XRD). In this work, three ternary compounds τ1, τ3, and τ4 were identified on the Fe-Dy side at 1073 K and 1173 K. The previously reported τ2 phase was not observed in the present work. Nine three-phase regions were determined in the present study and the isothermal sections of the Dy-Fe-B system on the Dy-Fe side at 1073 K and 1173 K were constructed. Based on the experimental data, thermodynamic modeling of the system was performed using the CALculation of PHAse Diagrams (CALPHAD) method. The calculated results show good agreement with the experimental data.",

keywords = "Compounds, Isothermal sections",

author = "Wei Yang and Yiwei Wang and Shuhong Liu and Peisheng Wang and Wei Zhai",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Ltd",

year = "2025",

month = jun,

doi = "10.1016/j.calphad.2025.102826",

language = "英语",

volume = "89",

journal = "Calphad: Computer Coupling of Phase Diagrams and Thermochemistry",

issn = "0364-5916",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Experimental determination and thermodynamic assessment of the Dy-Fe-B system

AU - Yang, Wei

AU - Wang, Yiwei

AU - Liu, Shuhong

AU - Wang, Peisheng

AU - Zhai, Wei

PY - 2025/6

Y1 - 2025/6

N2 - The phase equilibria of the Fe-Dy-B system on the Fe-Dy side are crucial for the development of Nd-Dy-Fe-B permanent magnets. Alloys located on the Fe-Dy side were prepared and annealed at 1073 K and 1173 K for 60 days. The annealed samples were analyzed by electron probe microanalysis (EPMA) and X-ray diffraction (XRD). In this work, three ternary compounds τ1, τ3, and τ4 were identified on the Fe-Dy side at 1073 K and 1173 K. The previously reported τ2 phase was not observed in the present work. Nine three-phase regions were determined in the present study and the isothermal sections of the Dy-Fe-B system on the Dy-Fe side at 1073 K and 1173 K were constructed. Based on the experimental data, thermodynamic modeling of the system was performed using the CALculation of PHAse Diagrams (CALPHAD) method. The calculated results show good agreement with the experimental data.

AB - The phase equilibria of the Fe-Dy-B system on the Fe-Dy side are crucial for the development of Nd-Dy-Fe-B permanent magnets. Alloys located on the Fe-Dy side were prepared and annealed at 1073 K and 1173 K for 60 days. The annealed samples were analyzed by electron probe microanalysis (EPMA) and X-ray diffraction (XRD). In this work, three ternary compounds τ1, τ3, and τ4 were identified on the Fe-Dy side at 1073 K and 1173 K. The previously reported τ2 phase was not observed in the present work. Nine three-phase regions were determined in the present study and the isothermal sections of the Dy-Fe-B system on the Dy-Fe side at 1073 K and 1173 K were constructed. Based on the experimental data, thermodynamic modeling of the system was performed using the CALculation of PHAse Diagrams (CALPHAD) method. The calculated results show good agreement with the experimental data.

KW - Compounds

KW - Isothermal sections

UR - https://www.scopus.com/pages/publications/105000756706

U2 - 10.1016/j.calphad.2025.102826

DO - 10.1016/j.calphad.2025.102826

M3 - 文章

AN - SCOPUS:105000756706

SN - 0364-5916

VL - 89

JO - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

JF - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

M1 - 102826

ER -

Experimental determination and thermodynamic assessment of the Dy-Fe-B system

Abstract

Keywords

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